2021-03-16  Cathie Chen  <cathiechen@igalia.com>

        Import css/css-contain test from WPT

        https://bugs.webkit.org/show_bug.cgi?id=223254

        Reviewed by NOBODY (OOPS!).

        * TestExpectations:

        * tests-options.json:

2021-03-16  Cathie Chen  <cathiechen@igalia.com>

        Import css/css-contain test from WPT

        https://bugs.webkit.org/show_bug.cgi?id=223254

        Reviewed by NOBODY (OOPS!).

        Import web-platform-tests/css/css-contain from upstream 868fe4c01aef5e27fedc51ea7d938cf556cffec2.

        * resources/import-expectations.json:

        * resources/resource-files.json:

        * web-platform-tests/css/css-contain/META.yml: Added.

        * web-platform-tests/css/css-contain/contain-animation-001-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-animation-001.html: Added.

        * web-platform-tests/css/css-contain/contain-chrome-thcrash-001-expected.txt: Added.

        * web-platform-tests/css/css-contain/contain-chrome-thcrash-001.html: Added.

        * web-platform-tests/css/css-contain/contain-content-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-content-001.html: Added.

        * web-platform-tests/css/css-contain/contain-content-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-content-002.html: Added.

        * web-platform-tests/css/css-contain/contain-content-003-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-content-003.html: Added.

        * web-platform-tests/css/css-contain/contain-content-004-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-content-004.html: Added.

        * web-platform-tests/css/css-contain/contain-content-011-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-content-011.html: Added.

        * web-platform-tests/css/css-contain/contain-crash.html: Added.

        * web-platform-tests/css/css-contain/contain-flexbox-outline-expected.txt: Added.

        * web-platform-tests/css/css-contain/contain-flexbox-outline.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-001.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-002-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-layout-002.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-003-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-layout-003.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-004-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-layout-004.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-005-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-layout-005.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-006-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-layout-006.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-007-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-layout-007.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-009-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-layout-009.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-010-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-layout-010.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-011-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-layout-011.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-012-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-layout-012.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-013-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-layout-013.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-014-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-layout-014.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-016-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-016.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-017-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-017.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-018-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-018.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-baseline-001-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-layout-baseline-001.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-baseline-002-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-layout-baseline-002.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-baseline-003-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-layout-baseline-003.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-baseline-004-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-baseline-004.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-baseline-005-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-baseline-005.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-breaks-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-breaks-001.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-breaks-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-breaks-002.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-button-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-button-001.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-cell-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-cell-001.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-cell-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-cell-002.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-containing-block-absolute-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-containing-block-absolute-001.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-containing-block-fixed-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-containing-block-fixed-001.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-flexbox-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-flexbox-001.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-formatting-context-float-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-formatting-context-float-001.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-formatting-context-margin-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-formatting-context-margin-001.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-grid-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-grid-001.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ifc-022-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ifc-022.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ignored-cases-ib-split-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ignored-cases-ib-split-001.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ignored-cases-no-principal-box-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ignored-cases-no-principal-box-001.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ignored-cases-no-principal-box-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ignored-cases-no-principal-box-002.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ignored-cases-no-principal-box-003-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ignored-cases-no-principal-box-003.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-independent-formatting-context-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-independent-formatting-context-001.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-independent-formatting-context-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-independent-formatting-context-002.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-independent-formatting-context-003-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-independent-formatting-context-003.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ink-overflow-013-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ink-overflow-013.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ink-overflow-014-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ink-overflow-014.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ink-overflow-015-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ink-overflow-015.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ink-overflow-016-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ink-overflow-016.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ink-overflow-017-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ink-overflow-017.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ink-overflow-018-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ink-overflow-018.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ink-overflow-019-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ink-overflow-019.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ink-overflow-020-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-ink-overflow-020.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-overflow-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-overflow-001.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-overflow-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-overflow-002.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-size-003-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-size-003.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-stacking-context-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-stacking-context-001.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-suppress-baseline-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-suppress-baseline-001.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-suppress-baseline-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-layout-suppress-baseline-002.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-001.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-002.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-004-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-004.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-005-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-005.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-006-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-006.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-007-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-007.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-008-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-008.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-009-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-paint-009.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-010-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-paint-010.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-011-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-paint-011.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-012-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-paint-012.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-014-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-014.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-015-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-015.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-016-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-016.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-017-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-017.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-018-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-018.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-019-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-019.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-020-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-020.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-021-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-021.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-022-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-022.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-023-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-paint-023.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-024-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-paint-024.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-025-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-025.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-047-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-047.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-048-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-paint-048.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-baseline-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-baseline-001.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-cell-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-cell-001.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-cell-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-cell-002.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-001.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-002.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-003-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-003.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-004-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-004.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-005-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-005.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-006-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-006.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-011-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-011.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-012-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-012.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-013-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-013.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-014-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-014.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-015-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-015.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-016-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-016.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-017-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-017.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-018-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-018.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-019-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-clip-019.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-containing-block-absolute-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-containing-block-absolute-001.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-containing-block-fixed-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-containing-block-fixed-001.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-formatting-context-float-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-formatting-context-float-001.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-formatting-context-margin-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-formatting-context-margin-001.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-ifc-011-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-ifc-011.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-ignored-cases-ib-split-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-ignored-cases-ib-split-001.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-ignored-cases-internal-table-001a-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-ignored-cases-internal-table-001a.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-ignored-cases-internal-table-001b-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-ignored-cases-internal-table-001b.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-ignored-cases-no-principal-box-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-ignored-cases-no-principal-box-001.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-ignored-cases-ruby-containing-block-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-ignored-cases-ruby-containing-block-001.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-ignored-cases-ruby-stacking-and-clipping-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-ignored-cases-ruby-stacking-and-clipping-001.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-independent-formatting-context-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-independent-formatting-context-001.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-independent-formatting-context-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-independent-formatting-context-002.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-independent-formatting-context-003-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-independent-formatting-context-003.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-size-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-size-001.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-size-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-size-002.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-size-003-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-size-003.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-stacking-context-001a-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-stacking-context-001a.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-stacking-context-001b-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-stacking-context-001b.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-table-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-table-001.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-table-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-paint-table-002.html: Added.

        * web-platform-tests/css/css-contain/contain-size-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-001.html: Added.

        * web-platform-tests/css/css-contain/contain-size-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-002.html: Added.

        * web-platform-tests/css/css-contain/contain-size-003-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-003.html: Added.

        * web-platform-tests/css/css-contain/contain-size-004-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-004.html: Added.

        * web-platform-tests/css/css-contain/contain-size-005-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-005.html: Added.

        * web-platform-tests/css/css-contain/contain-size-006-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-006.html: Added.

        * web-platform-tests/css/css-contain/contain-size-007-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-007.html: Added.

        * web-platform-tests/css/css-contain/contain-size-008-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-008.html: Added.

        * web-platform-tests/css/css-contain/contain-size-009-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-009.html: Added.

        * web-platform-tests/css/css-contain/contain-size-010-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-010.html: Added.

        * web-platform-tests/css/css-contain/contain-size-011-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-011.html: Added.

        * web-platform-tests/css/css-contain/contain-size-012-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-012.html: Added.

        * web-platform-tests/css/css-contain/contain-size-012b-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-012b.html: Added.

        * web-platform-tests/css/css-contain/contain-size-013-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-size-013.html: Added.

        * web-platform-tests/css/css-contain/contain-size-021-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-021.html: Added.

        * web-platform-tests/css/css-contain/contain-size-023-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-023.html: Added.

        * web-platform-tests/css/css-contain/contain-size-025-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-025.html: Added.

        * web-platform-tests/css/css-contain/contain-size-027-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-027.html: Added.

        * web-platform-tests/css/css-contain/contain-size-041-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-041.html: Added.

        * web-platform-tests/css/css-contain/contain-size-042-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-042.html: Added.

        * web-platform-tests/css/css-contain/contain-size-051-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-051.html: Added.

        * web-platform-tests/css/css-contain/contain-size-052-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-052.html: Added.

        * web-platform-tests/css/css-contain/contain-size-056-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-056.html: Added.

        * web-platform-tests/css/css-contain/contain-size-061-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-061.html: Added.

        * web-platform-tests/css/css-contain/contain-size-062-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-062.html: Added.

        * web-platform-tests/css/css-contain/contain-size-063-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-063.html: Added.

        * web-platform-tests/css/css-contain/contain-size-064-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-064.html: Added.

        * web-platform-tests/css/css-contain/contain-size-baseline-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-baseline-001.html: Added.

        * web-platform-tests/css/css-contain/contain-size-block-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-block-001.html: Added.

        * web-platform-tests/css/css-contain/contain-size-block-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-block-002.html: Added.

        * web-platform-tests/css/css-contain/contain-size-block-003-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-block-003.html: Added.

        * web-platform-tests/css/css-contain/contain-size-block-004-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-block-004.html: Added.

        * web-platform-tests/css/css-contain/contain-size-borders-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-size-borders.html: Added.

        * web-platform-tests/css/css-contain/contain-size-breaks-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-breaks-001.html: Added.

        * web-platform-tests/css/css-contain/contain-size-button-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-button-001.html: Added.

        * web-platform-tests/css/css-contain/contain-size-button-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-button-002.html: Added.

        * web-platform-tests/css/css-contain/contain-size-fieldset-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-fieldset-001.html: Added.

        * web-platform-tests/css/css-contain/contain-size-fieldset-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-fieldset-002.html: Added.

        * web-platform-tests/css/css-contain/contain-size-fieldset-003-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-fieldset-003.html: Added.

        * web-platform-tests/css/css-contain/contain-size-fieldset-004-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-fieldset-004.html: Added.

        * web-platform-tests/css/css-contain/contain-size-flex-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-flex-001.html: Added.

        * web-platform-tests/css/css-contain/contain-size-flexbox-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-flexbox-001.html: Added.

        * web-platform-tests/css/css-contain/contain-size-flexbox-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-flexbox-002.html: Added.

        * web-platform-tests/css/css-contain/contain-size-grid-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-grid-001.html: Added.

        * web-platform-tests/css/css-contain/contain-size-grid-002-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-size-grid-002.html: Added.

        * web-platform-tests/css/css-contain/contain-size-grid-003-expected.txt: Added.

        * web-platform-tests/css/css-contain/contain-size-grid-003.html: Added.

        * web-platform-tests/css/css-contain/contain-size-grid-004-expected.txt: Added.

        * web-platform-tests/css/css-contain/contain-size-grid-004.html: Added.

        * web-platform-tests/css/css-contain/contain-size-grid-005-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-grid-005.html: Added.

        * web-platform-tests/css/css-contain/contain-size-inline-block-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-inline-block-001.html: Added.

        * web-platform-tests/css/css-contain/contain-size-inline-block-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-inline-block-002.html: Added.

        * web-platform-tests/css/css-contain/contain-size-inline-block-003-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-inline-block-003.html: Added.

        * web-platform-tests/css/css-contain/contain-size-inline-block-004-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-inline-block-004.html: Added.

        * web-platform-tests/css/css-contain/contain-size-inline-flex-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-inline-flex-001.html: Added.

        * web-platform-tests/css/css-contain/contain-size-monolithic-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-monolithic-001.html: Added.

        * web-platform-tests/css/css-contain/contain-size-monolithic-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-monolithic-002.html: Added.

        * web-platform-tests/css/css-contain/contain-size-multicol-001-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-size-multicol-001.html: Added.

        * web-platform-tests/css/css-contain/contain-size-multicol-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-multicol-002.html: Added.

        * web-platform-tests/css/css-contain/contain-size-multicol-003-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-multicol-003.html: Added.

        * web-platform-tests/css/css-contain/contain-size-multicol-004-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-multicol-004.html: Added.

        * web-platform-tests/css/css-contain/contain-size-multicol-as-flex-item-expected.txt: Added.

        * web-platform-tests/css/css-contain/contain-size-multicol-as-flex-item.html: Added.

        * web-platform-tests/css/css-contain/contain-size-replaced-001-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-size-replaced-001.html: Added.

        * web-platform-tests/css/css-contain/contain-size-replaced-002-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-size-replaced-002.html: Added.

        * web-platform-tests/css/css-contain/contain-size-replaced-003a-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-replaced-003a.html: Added.

        * web-platform-tests/css/css-contain/contain-size-replaced-003b-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-replaced-003b.html: Added.

        * web-platform-tests/css/css-contain/contain-size-replaced-003c-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-replaced-003c.html: Added.

        * web-platform-tests/css/css-contain/contain-size-replaced-004-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-replaced-004.html: Added.

        * web-platform-tests/css/css-contain/contain-size-replaced-005-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-replaced-005.html: Added.

        * web-platform-tests/css/css-contain/contain-size-replaced-006-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-replaced-006.html: Added.

        * web-platform-tests/css/css-contain/contain-size-replaced-007-expected.xht: Added.

        * web-platform-tests/css/css-contain/contain-size-replaced-007.html: Added.

        * web-platform-tests/css/css-contain/contain-size-scrollbars-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-scrollbars-001.html: Added.

        * web-platform-tests/css/css-contain/contain-size-scrollbars-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-scrollbars-002.html: Added.

        * web-platform-tests/css/css-contain/contain-size-scrollbars-003-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-scrollbars-003.html: Added.

        * web-platform-tests/css/css-contain/contain-size-scrollbars-004-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-scrollbars-004.html: Added.

        * web-platform-tests/css/css-contain/contain-size-select-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-select-001.html: Added.

        * web-platform-tests/css/css-contain/contain-size-select-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-select-002.html: Added.

        * web-platform-tests/css/css-contain/contain-size-select-elem-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-select-elem-001.html: Added.

        * web-platform-tests/css/css-contain/contain-size-select-elem-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-select-elem-002.html: Added.

        * web-platform-tests/css/css-contain/contain-size-select-elem-003-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-select-elem-003.html: Added.

        * web-platform-tests/css/css-contain/contain-size-select-elem-004-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-select-elem-004.html: Added.

        * web-platform-tests/css/css-contain/contain-size-select-elem-005-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-select-elem-005.html: Added.

        * web-platform-tests/css/css-contain/contain-size-table-caption-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-size-table-caption-001.html: Added.

        * web-platform-tests/css/css-contain/contain-strict-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-strict-001.html: Added.

        * web-platform-tests/css/css-contain/contain-strict-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-strict-002.html: Added.

        * web-platform-tests/css/css-contain/contain-strict-003-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-strict-003.html: Added.

        * web-platform-tests/css/css-contain/contain-strict-011-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-strict-011.html: Added.

        * web-platform-tests/css/css-contain/contain-style-baseline-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-style-baseline-001.html: Added.

        * web-platform-tests/css/css-contain/contain-style-breaks-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-style-breaks-001.html: Added.

        * web-platform-tests/css/css-contain/contain-style-breaks-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-style-breaks-002.html: Added.

        * web-platform-tests/css/css-contain/contain-style-breaks-003-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-style-breaks-003.html: Added.

        * web-platform-tests/css/css-contain/contain-style-breaks-004-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-style-breaks-004.html: Added.

        * web-platform-tests/css/css-contain/contain-style-breaks-005-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-style-breaks-005.html: Added.

        * web-platform-tests/css/css-contain/contain-style-counters-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-style-counters-001.html: Added.

        * web-platform-tests/css/css-contain/contain-style-counters-002-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-style-counters-002.html: Added.

        * web-platform-tests/css/css-contain/contain-style-counters-003-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-style-counters-003.html: Added.

        * web-platform-tests/css/css-contain/contain-style-counters-004-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-style-counters-004.html: Added.

        * web-platform-tests/css/css-contain/contain-subgrid-001-expected.html: Added.

        * web-platform-tests/css/css-contain/contain-subgrid-001.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-001-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-001.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-002-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-002.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-003-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-003.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-004-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-004.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-005-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-005.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-006-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-006.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-007-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-007.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-008-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-008.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-009-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-009.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-010-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-010.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-011-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-011.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-012-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-012.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-013-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-013.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-014-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-014.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-015-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-015.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-016-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-016.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-017-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-017.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-018-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-018.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-019.sub.https-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-019.sub.https.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-020-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-020.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-021-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-021.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-022-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-022.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-023-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-023.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-024-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-024.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-025-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-025.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-026-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-026.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-027-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-027.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-028-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-028.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-029-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-029.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-030-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-030.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-031-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-031.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-032-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-032.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-033.sub.https-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-033.sub.https.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-034-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-034.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-035-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-035.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-036-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-036.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-037-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-037.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-038-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-038.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-039-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-039.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-040-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-040.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-041-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-041.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-042-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-042.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-043-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-043.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-044-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-044.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-045-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-045.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-046-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-046.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-047-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-047.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-048-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-048.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-049-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-049.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-050-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-050.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-051-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-051.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-052-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-052.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-053-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-053.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-054-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-054.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-055-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-055.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-056-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-056.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-057-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-057.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-058-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-058.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-059-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-059.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-060-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-060.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-061-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-061.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-062-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-062.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-063-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-063.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-064-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-064.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-065-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-065.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-066-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-066.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-067-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-067.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-068-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-068.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-069-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-069.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-070-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-070.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-071-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-071.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-072-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-072.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-073-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-073.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-074-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-074.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-075-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-075.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-076-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-076.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-077-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-077.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-078-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-078.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-079-expected.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-079.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-080-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-080.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-081-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-081.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/content-visibility-form-controls-crash.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/inheritance-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/inheritance.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/parsing/content-visibility-computed-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/parsing/content-visibility-computed.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/parsing/content-visibility-invalid-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/parsing/content-visibility-invalid.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/parsing/content-visibility-valid-expected.txt: Added.

        * web-platform-tests/css/css-contain/content-visibility/parsing/content-visibility-valid.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/parsing/w3c-import.log: Added.

        * web-platform-tests/css/css-contain/content-visibility/resources/circles.svg: Added.

        * web-platform-tests/css/css-contain/content-visibility/resources/dice.png: Added.

        * web-platform-tests/css/css-contain/content-visibility/resources/frame.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/resources/text-fragment-target-auto.html: Added.

        * web-platform-tests/css/css-contain/content-visibility/resources/w3c-import.log: Added.

        * web-platform-tests/css/css-contain/content-visibility/w3c-import.log: Added.

        * web-platform-tests/css/css-contain/counter-scoping-001-expected.html: Added.

        * web-platform-tests/css/css-contain/counter-scoping-001.html: Added.

        * web-platform-tests/css/css-contain/counter-scoping-002-expected.html: Added.

        * web-platform-tests/css/css-contain/counter-scoping-002.html: Added.

        * web-platform-tests/css/css-contain/counter-scoping-003-expected.html: Added.

        * web-platform-tests/css/css-contain/counter-scoping-003.html: Added.

        * web-platform-tests/css/css-contain/inheritance-expected.txt: Added.

        * web-platform-tests/css/css-contain/inheritance.html: Added.

        * web-platform-tests/css/css-contain/parsing/contain-computed-expected.txt: Added.

        * web-platform-tests/css/css-contain/parsing/contain-computed.html: Added.

        * web-platform-tests/css/css-contain/parsing/contain-invalid-expected.txt: Added.

        * web-platform-tests/css/css-contain/parsing/contain-invalid.html: Added.

        * web-platform-tests/css/css-contain/parsing/contain-valid-expected.txt: Added.

        * web-platform-tests/css/css-contain/parsing/contain-valid.html: Added.

        * web-platform-tests/css/css-contain/parsing/w3c-import.log: Added.

        * web-platform-tests/css/css-contain/quote-scoping-001-expected.html: Added.

        * web-platform-tests/css/css-contain/quote-scoping-001.html: Added.

        * web-platform-tests/css/css-contain/quote-scoping-002-expected.html: Added.

        * web-platform-tests/css/css-contain/quote-scoping-002.html: Added.

        * web-platform-tests/css/css-contain/quote-scoping-003-expected.html: Added.

        * web-platform-tests/css/css-contain/quote-scoping-003.html: Added.

        * web-platform-tests/css/css-contain/quote-scoping-004-expected.html: Added.

        * web-platform-tests/css/css-contain/quote-scoping-004.html: Added.

        * web-platform-tests/css/css-contain/support/60x60-green.png: Added.

        * web-platform-tests/css/css-contain/support/blue-100x100.png: Added.

        * web-platform-tests/css/css-contain/support/blue50wBy25h.png: Added.

        * web-platform-tests/css/css-contain/support/blue50wBy46h.png: Added.

        * web-platform-tests/css/css-contain/support/pattern-gg-gr-100x100.png: Added.

        * web-platform-tests/css/css-contain/support/swatch-blue.png: Added.

        * web-platform-tests/css/css-contain/support/swatch-orange.png: Added.

        * web-platform-tests/css/css-contain/support/swatch-red.png: Added.

        * web-platform-tests/css/css-contain/support/swatch-yellow.png: Added.

        * web-platform-tests/css/css-contain/support/w3c-import.log: Added.

        * web-platform-tests/css/css-contain/support/white.webm: Added.

        * web-platform-tests/css/css-contain/w3c-import.log: Added.

# CSS containment tests that fail

imported/w3c/web-platform-tests/css/css-contain/contain-animation-001.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-content-001.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-content-002.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-content-003.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-content-004.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-content-011.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-006.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-007.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-013.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-014.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-016.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-baseline-001.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-baseline-002.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-baseline-003.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-baseline-004.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-baseline-005.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/content-visibility/content-visibility-001.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/content-visibility/content-visibility-003.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/content-visibility/content-visibility-004.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/content-visibility/content-visibility-005.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/content-visibility/content-visibility-006.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/content-visibility/content-visibility-007.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/content-visibility/content-visibility-008.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/content-visibility/content-visibility-009.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/content-visibility/content-visibility-010.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/content-visibility/content-visibility-011.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/content-visibility/content-visibility-019.sub.https.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/content-visibility/content-visibility-020.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/content-visibility/content-visibility-021.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/content-visibility/content-visibility-022.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-button-001.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-cell-001.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-cell-002.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-containing-block-absolute-001.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-containing-block-fixed-001.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-flexbox-001.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-formatting-context-float-001.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-formatting-context-margin-001.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-grid-001.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-ifc-022.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-independent-formatting-context-001.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-ink-overflow-013.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-ink-overflow-014.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-ink-overflow-015.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-ink-overflow-016.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-ink-overflow-017.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-ink-overflow-018.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-ink-overflow-019.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-ink-overflow-020.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-overflow-001.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-overflow-002.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-size-003.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-stacking-context-001.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-suppress-baseline-001.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-layout-suppress-baseline-002.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-paint-001.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-paint-004.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-paint-005.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-paint-006.html [ ImageOnlyFailure ]

imported/w3c/web-platform-tests/css/css-contain/contain-paint-008.html [ ImageOnlyFailure ]

    "web-platform-tests/css/css-contain": "import", 

        "web-platform-tests/css/css-contain/contain-crash.html",

        "web-platform-tests/css/css-contain/content-visibility/content-visibility-form-controls-crash.html",

spec: https://drafts.csswg.org/css-contain/

suggested_reviewers:

  - tabatkins

  - frivoal

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

 <head>

  <title>CSS Reftest Reference</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />

  <style type="text/css"><![CDATA[

  div

  {

  background-color: green;

  height: 100px;

  width: 100px;

  }

  ]]></style>

 </head>

 <body>

  <p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

  <div></div>

 </body>

</html>

<!DOCTYPE html>

<meta charset="utf-8">

<title>CSS Containment Test: contain is not animatable</title>

<link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net/">

<link rel="help" href="https://drafts.csswg.org/css-contain/#contain-property">

<link rel="match" href="../reference/ref-filled-green-100px-square.xht">

<meta name=assert content="the contain property is not animatable">

<style>

div {

  border: 50px solid green;

  background: red;

  position: absolute; /* for shrinkwrap */

  contain: strict;

  animation-duration: 1s;

  animation-name: bad;

  animation-play-state: paused;

  font-size: 100px;

}

@keyframes bad {

  from {

    contain: none;

  }

}

</style>

<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

<div>&nbsp;</div>

PASS chrome does not crash with contain

<!DOCTYPE html>

<title>CSS Overflow and Transforms: css-overflow-3</title>

<link rel="author" href="mailto:atotic@google.com">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<link rel="help" href="https://crbug.com/964924">

<meta name="assert" content="chrome does not crash with css contain edge case">

<style>

  * {

    contain: size layout;

  }

  html {

    outline-style: auto;

    margin-bottom: 39%;

  }

  #target {

    -webkit-appearance: push-button;

  }

</style>

<output id="target">text</output>

<script>

test(() => {

  document.body.offsetTop;

  document.querySelector("#target").value = "";

  document.body.offsetTop;

  assert_equals(document.querySelector("#target").value, "");

}, 'chrome does not crash with contain');

</script>

<!DOCTYPE html>

  <meta charset="UTF-8">

  <title>CSS Reference Test</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">

  <style>

  div

    {

      color: transparent;

      float: left;

      font-size: 16px;

      padding: 8px;

    }

  div#blue-rectangle

    {

      background-color: blue;

      margin: 8px;

      width: 6em;

    }

  div#orange-rectangle

    {

      background-color: orange;

      width: 12em;

    }

  </style>

  <p>Test passes if the orange rectangle and blue rectangle do not overlap.

  <div id="blue-rectangle">Some text in a blue rectangle.</div>

  <div id="orange-rectangle">Some text in an orange rectangle. Some text in an orange rectangle. Some text in an orange rectangle.</div>

<!DOCTYPE html>

  <meta charset="UTF-8">

  <title>CSS Containment Test: a block with 'contain: content' alongside a float</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">

  <link rel="help" href="https://www.w3.org/TR/css-contain-1/#contain-property">

  <link rel="match" href="reference/contain-layout-ifc-022-ref.html">

  <meta content="" name="flags">

  <style>

  div

    {

      color: transparent;

      font-size: 16px;

      padding: 8px;

    }

  div#floated-left

    {

      background-color: blue;

      float: left;

      margin: 8px;

      width: 6em;

    }

  div#with-contain-content

    {

      background-color: orange;

      width: 12em;

      contain: content;

    }

  </style>

  <p>Test passes if the orange rectangle and blue rectangle do not overlap.

  <div id="floated-left">Some text in a blue rectangle.</div>

  <div id="with-contain-content">Some text in an orange rectangle. Some text in an orange rectangle. Some text in an orange rectangle.</div>

<!DOCTYPE html>

  <meta charset="UTF-8">

  <title>CSS Reference Test</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">

  <style>

  p

    {

      margin-bottom: 30px;

    }

  div

    {

      height: 30px;

    }

  div.orange

    {

      background-color: orange;

    }

  div.blue

    {

      background-color: blue;

    }

  div#lime

    {

      background-color: lime;

    }

  </style>

  <p>Test passes if there are 5 horizontal stripes across the page in this order (from top to bottom): an orange stripe, a blue stripe, a bright green stripe, a blue stripe and then an orange stripe.

  <div class="orange"></div>

  <div class="blue"></div>

  <div id="lime"></div>

  <div class="blue"></div>

  <div class="orange"></div>

<!DOCTYPE html>

  <meta charset="UTF-8">

  <title>CSS Containment Test: 'contain: content' and margin collapsing</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">

  <link rel="help" href="https://www.w3.org/TR/css-contain-1/#contain-property">

  <link rel="match" href="reference/contain-paint-ifc-011-ref.html">

  <meta content="This test checks that a block element with 'contain: content' establishes a new block formatting context which is independent and separate from others. This causes margin collapsing to be ineffective among vertically-adjacent boxes. In this test, the top margin of parent boxes and top margin of their respective first in-flow child do not collapse. Also, in this test, the bottom margin of the last in-flow child of boxes and bottom margin of their respective parent boxes do not collapse." name="assert">

  <meta name="flags" content="">

  <style>

  div

    {

      contain: content;

      margin: 30px 0px;

    }

  div#grand-grand-parent-orange

    {

      background-color: orange;

    }

  div#grand-parent-blue

    {

      background-color: blue;

    }

  div#parent-lime

    {

      background-color: lime;

    }

  div#collapse-through-child  /* margin collapsing through element */

    {

      contain: none;

    }

  </style>

  <p>Test passes if there are 5 horizontal stripes across the page in this order (from top to bottom): an orange stripe, a blue stripe, a bright green stripe, a blue stripe and then an orange stripe.

  <div id="grand-grand-parent-orange">

    <div id="grand-parent-blue">

      <div id="parent-lime">

        <div id="collapse-through-child"></div>

      </div>

    </div>

  </div>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

 <head>

  <title>CSS Reftest Reference</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />

  <style type="text/css"><![CDATA[

  div

  {

  background-color: green;

  height: 100px;

  width: 100px;

  }

  ]]></style>

 </head>

 <body>

  <p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

  <div></div>

 </body>

</html>

<!DOCTYPE html>

  <meta charset="UTF-8">

  <title>CSS Containment Test: element with 'contain: content' and absolutely positioned descendants</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">

  <link rel="help" href="https://drafts.csswg.org/css-contain/#contain-property">

  <link rel="match" href="../reference/ref-filled-green-100px-square.xht">

  <meta name="flags" content="">

  <meta name="assert" content="This test checks that an element with 'contain: content' acts as containing block for its absolutely positioned descendants.">

  <style>

  div

    {

      width: 100px;

    }

  div#contain-content

    {

      background-color: red;

      contain: content;

      height: 100px;

    }

  div.abspos

    {

      background-color: green;

      height: 50px;

      position: absolute;

      right: 0;

    }

  div#first-abspos

    {

      top: 0px;

    }

  div#second-abspos

    {

      bottom: 0px;

    }

  </style>

  <body>

  <p>Test passes if there is a filled green square and <strong>no red</strong>.

  <div id="contain-content">

    <div id="first-abspos" class="abspos"></div>

    <div id="second-abspos" class="abspos"></div>

  </div>

<!DOCTYPE html>

  <meta charset="UTF-8">

  <title>CSS Reference Test</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">

  <style>

  table

    {

      background-color: blue;

      border-spacing: 2px;

      height: 206px;

      table-layout: fixed;

      width: 206px;

    }

  td

    {

      background-color: white;

      padding: 0px;

      vertical-align: baseline;

    }

  span

    {

      background-color: green;

      color: white;

      font-family: monospace;

      vertical-align: top;

    }

  </style>

  <p>Test passes if there is the word PASS and if there is <strong>no red</strong>.

  <table>

    <tr><td>&nbsp;<td>&nbsp;

    <tr><td>&nbsp;<td><span>PASS</span>

  </table>

<!DOCTYPE html>

  <meta charset="UTF-8">

  <title>CSS Containment Test: 'contain: content' applies to 'table-cell' elements</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">

  <link rel="help" href="https://www.w3.org/TR/css-contain-1/#containment-layout">

  <link rel="match" href="reference/contain-layout-cell-001-ref.html">

  <meta content="In this test, the td#contain should act as the containing block for div#abs-pos ." name="assert">

  <meta name="flags" content="">

  <style>

  table

    {

      background-color: blue;

      border-spacing: 2px;

      height: 206px;

      table-layout: fixed;

      width: 206px;

    }

  td

    {

      background-color: white;

      padding: 0px;

      vertical-align: top;

    }

  td#contain

    {

      contain: content;

    }

  span

    {

      background-color: red;

      color: yellow;

      font-family: monospace;

      vertical-align: top;

    }

  div#abs-pos

    {

      background-color: green;

      color: white;

      font-family: monospace;

      left: 0px;

      position: absolute;

      top: 0px;

    }

  </style>

  <p>Test passes if there is the word PASS and if there is <strong>no red</strong>.

  <table>

    <tr><td>&nbsp;<td>&nbsp;

    <tr><td>&nbsp;<td id="contain"><span>FAIL</span><div id="abs-pos">PASS</div>

  </table>

<!DOCTYPE html>

  <meta charset="UTF-8">

  <title>CSS Reference Test</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">

  <style>

  div#green-square

    {

      background-color: green;

      height: 100px;

      width: 100px;

    }

  div#result

    {

      font-size: 3em;

    }

  </style>

  <p>Test passes if there is a filled green square, no red and the number 25.

  <div id="green-square"></div>

  <div id="result">25</div>

<!DOCTYPE html>

  <meta charset="UTF-8">

  <title>CSS Containment Test: 'contain: content' does not turn on style containment</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">

  <link rel="help" href="https://drafts.csswg.org/css-contain/#contain-property">

  <link rel="match" href="reference/contain-content-011-ref.html">

  <meta name="flags" content="">

  <meta name="assert" content="'contain: content' does not turn on style containment. So, in this test, the counter of div.abspos child should not be reset and must not be reset.">

  <style>

  body

    {

      counter-reset: counter-of-abspos-div 17;

    }

    /*

    This creates a new counter identified as

    "counter-of-abspos-div" and initially sets

    such counter to 17 (an entirely arbitrary

    number)

    */

  div

    {

      width: 100px;

    }

  div#contain-content

    {

      background-color: red;

      contain: content;

      height: 100px;

    }

  div.abspos

    {

      background-color: green;

      height: 50px;

      position: absolute;

      right: 0;

    }

  div#contain-content > div.abspos

    {

      counter-increment: counter-of-abspos-div 4;

    }

    /*

    This increments the counter identified as

    "counter-of-abspos-div" of the step value

    of 4 (an entirely arbitrary number) each and

    every time there is a div.abspos child

    within the subtree of div#contain-content

    */

  div#first-abspos

    {

      top: 0px;

    }

  div#second-abspos

    {

      bottom: 0px;

    }

  div#result::after

    {

      content: counter(counter-of-abspos-div);

      font-size: 3em;

    }

    /*

    Now, the generated content is set to the

    current value of the counter identified

    as "counter-of-abspos-div":

    17 + 4 * 2 == 25

    */

  </style>

  <body>

  <p>Test passes if there is a filled green square, no red and the number 25.

  <div id="contain-content">

    <div id="first-abspos" class="abspos"></div>

    <div id="second-abspos" class="abspos"></div>

  </div>

  <div id="result"></div>

<!DOCTYPE html>

<link rel="help" href="https://crbug.com/1129563">

<body style="contain: size layout;">

  <div id="target" style="contain: size layout;"></div>

  <div id="child"></div>

</body>

<script>

document.body.offsetTop;

const target = document.getElementById('target');

const child = document.getElementById('child');

target.appendChild(child);

</script>

PASS Pass if no crash

<!doctype html>

<title>Test `contain: strict` to Flexbox does not crash</title>

<link rel="help" href="https://www.w3.org/TR/css-contain-1/#contain-property">

<link rel="author" href="mailto:kojii@chromium.org">

<style>

body {

  contain: strict;

  display: flex;

}

html {

  outline: 1px auto;

}

</style>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<div id="target"></div>

<div id="log"></div>

<script>

test(() => {

  document.body.offsetTop;

  target.style.width = '100px';

  document.body.offsetTop;

}, "Pass if no crash");

</script>

<!doctype html>

<html>

<head>

   <title>Reference rendering - passes if there is the word "PASS" below</title>

   <link rel="author" title="Opera" href="https://www.opera.com/">

</head>

<body>

   <p>Test passes if there is the word "PASS" below.</p>

   <div>PASS</div>

</body>

</html>

<!doctype html>

<html lang=en>

  <meta charset=utf-8>

  <title>CSS-contain test: layout containment on non-atomic inlines</title>

  <link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net">

  <meta name=flags content="">

  <meta name=assert content="layout containment does not apply to non atomic inlines">

  <link rel="match" href="../reference/pass_if_pass_below.html">

  <link rel=help href="https://drafts.csswg.org/css-contain-1/#containment-layout">

<style>

#pa {

  contain: layout;

  height: 100vh; /*If layout containment applies, the span becomes a BFC, height applies, and knocks SS off the page */

}

#ss {

  vertical-align: bottom;

}

</style>

<p>Test passes if there is the word "PASS" below.</p>

<div><span id="pa">PA</span><span id="ss">SS</span></div>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

 <head>

  <title>CSS Reftest Reference</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />

  <style type="text/css"><![CDATA[

  div

  {

  background-color: green;

  height: 100px;

  width: 100px;

  }

  ]]></style>

 </head>

 <body>

  <p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

  <div></div>

 </body>

</html>

<!doctype html>

<html lang=en>

  <meta charset=utf-8>

  <title>CSS-contain test: layout containment on ruby-base</title>

  <link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net">

  <meta name=flags content="ahem">

  <meta name=assert content="layout containment does not apply to ruby-base">

  <link rel="match" href="../reference/ref-filled-green-100px-square.xht">

  <link rel=help href="https://drafts.csswg.org/css-contain-1/#containment-layout">

<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />

<style>

div {

  position: relative;

  background: red;

  width: 100px;

  height: 100px;

  padding: 25px;

  box-sizing: border-box;

}

rb {

  contain: layout;

  display: ruby-base;

  font-family: Ahem;

  font-size: 100px;

  line-height: 1;

}

rb::after {

  content: "X";

  color: green;

  position: absolute;

  top:0; left: 0;

}

</style>

<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

<div><ruby><rb></rb></ruby></div>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

 <head>

  <title>CSS Reftest Reference</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />

  <style type="text/css"><![CDATA[

  div

  {

  background-color: green;

  height: 100px;

  width: 100px;

  }

  ]]></style>

 </head>

 <body>

  <p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

  <div></div>

 </body>

</html>

<!doctype html>

<html lang=en>

  <meta charset=utf-8>

  <title>CSS-contain test: layout containment on ruby-base-container</title>

  <link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net">

  <meta name=flags content="ahem">

  <meta name=assert content="layout containment does not apply to ruby-base-container">

  <link rel="match" href="../reference/ref-filled-green-100px-square.xht">

  <link rel=help href="https://drafts.csswg.org/css-contain-1/#containment-layout">

<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />

<style>

div {

  position: relative;

  background: red;

  width: 100px;

  height: 100px;

  padding: 25px;

  box-sizing: border-box;

}

rbc {

  contain: layout;

  display: ruby-base-container;

  font-family: Ahem;

  font-size: 100px;

  line-height: 1;

}

rbc::after {

  content: "X";

  color: green;

  position: absolute;

  top:0; left: 0;

}

</style>

<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

<div><ruby><rbc></rbc></ruby></div>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

 <head>

  <title>CSS Reftest Reference</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />

  <style type="text/css"><![CDATA[

  div

  {

  background-color: green;

  height: 100px;

  width: 100px;

  }

  ]]></style>

 </head>

 <body>

  <p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

  <div></div>

 </body>

</html>

<!doctype html>

<html lang=en>

  <meta charset=utf-8>

  <title>CSS-contain test: layout containment on ruby-text-container</title>

  <link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net">

  <meta name=flags content="ahem">

  <meta name=assert content="layout containment does not apply to ruby-text-container">

  <link rel="match" href="../reference/ref-filled-green-100px-square.xht">

  <link rel=help href="https://drafts.csswg.org/css-contain-1/#containment-layout">

<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />

<style>

div {

  position: relative;

  background: red;

  width: 100px;

  height: 100px;

  padding: 25px;

  box-sizing: border-box;

}

rtc {

  contain: layout;

  display: ruby-text-container;

  font-family: Ahem;

  font-size: 100px;

  line-height: 1;

}

rtc::after {

  content: "X";

  color: green;

  position: absolute;

  top:0; left: 0;

}

</style>

<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

<div><ruby><rtc></rtc></ruby></div>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

 <head>

  <title>CSS Reftest Reference</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />

  <style type="text/css"><![CDATA[

  div

  {

  background-color: green;

  height: 100px;

  width: 100px;

  }

  ]]></style>

 </head>

 <body>

  <p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

  <div></div>

 </body>

</html>

<!doctype html>

<html lang=en>

  <meta charset=utf-8>

  <title>CSS-contain test: layout containment on ruby-text</title>

  <link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net">

  <meta name=flags content="ahem">

  <meta name=assert content="layout containment does not apply to ruby-text">

  <link rel="match" href="../reference/ref-filled-green-100px-square.xht">

  <link rel=help href="https://drafts.csswg.org/css-contain-1/#containment-layout">

<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />

<style>

div {

  position: relative;

  background: red;

  width: 100px;

  height: 100px;

  padding: 25px;

  box-sizing: border-box;

}

rt {

  contain: layout;

  display: -webkit-ruby-text;

  font-family: Ahem;

  font-size: 100px;

  line-height: 1;

}

rt::after {

  content: "X";

  color: green;

  position: absolute;

  top:0; left: 0;

}

</style>

<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

<div><ruby><rt></rt></ruby></div>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

 <head>

  <title>CSS Reftest Reference</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />

  <style type="text/css"><![CDATA[

  div

  {

  background-color: green;

  height: 100px;

  width: 100px;

  }

  ]]></style>

 </head>

 <body>

  <p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

  <div></div>

 </body>

</html>

<!DOCTYPE html>

<meta charset="utf-8">

<title>CSS Containment Test: Layout containment absolutely positioned descendants</title>

<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">

<link rel="help" href="https://drafts.csswg.org/css-contain-1/#containment-layout">

<link rel="match" href="../reference/ref-filled-green-100px-square.xht">

<meta name=assert content="Layout containment makes an element to act as containing block for absolutely positioned descendants.">

<style>

#contain-layout {

  contain: layout;

  width: 100px;

  height: 100px;

  background: red;

}

#abspos {

  position: absolute;

  bottom: 0;

  right: 0;

  background: green;

  width: 100px;

  height: 100px;

}

</style>

<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

<div id="contain-layout">

  <div id="abspos"></div>

</div>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

 <head>

  <title>CSS Reftest Reference</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />

  <style type="text/css"><![CDATA[

  div

  {

  background-color: green;

  height: 100px;

  width: 100px;

  }

  ]]></style>

 </head>

 <body>

  <p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

  <div></div>

 </body>

</html>

<!DOCTYPE html>

<meta charset="utf-8">

<title>CSS Containment Test: Layout containment fixed positioned descendants</title>

<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">

<link rel="help" href="https://drafts.csswg.org/css-contain-1/#containment-layout">

<link rel="match" href="../reference/ref-filled-green-100px-square.xht">

<meta name=assert content="Layout containment makes an element to act as containing block for fixed positioned descendants.">

<style>

#contain-layout {

  contain: layout;

  width: 100px;

  height: 100px;

  background: red;

}

#fixed {

  position: fixed;

  bottom: 0;

  right: 0;

  background: green;

  width: 100px;

  height: 100px;

}

</style>

<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

<div id="contain-layout">

  <div id="fixed"></div>

</div>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

 <head>

  <title>CSS Reftest Reference</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />

  <style type="text/css"><![CDATA[

  div

  {

  background-color: green;

  height: 100px;

  width: 100px;

  }

  ]]></style>

 </head>

 <body>

  <p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

  <div></div>

 </body>

</html>

<!DOCTYPE html>

<meta charset=utf-8>

<title>CSS Containment Test: Layout containment on table-row-group</title>

<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">

<link rel="help" href="https://drafts.csswg.org/css-contain-1/#containment-layout">

<link rel="match" href="../reference/ref-filled-green-100px-square.xht">

<meta name=flags content="ahem">

<meta name=assert content="Layout containment doesn't apply to table-row-group elements.">

<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />

<style>

#wrapper {

  position: relative;

  background: red;

  width: 100px;

  height: 100px;

  padding: 25px;

  box-sizing: border-box;

}

#table-row-group {

  display: table-row-group;

  contain: layout;

}

#abspos {

  position: absolute;

  font: 100px/1 Ahem;

  color: green;

  top: 0;

  left: 0;

}

</style>

<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>

<div id="wrapper">

  <div id="table-row-group">

    <div id="abspos">X</div>

  </div>

</div>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

 <head>

  <title>CSS Reftest Reference</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />

  <style type="text/css"><![CDATA[

  div

  {

  background-color: green;

  height: 100px;

  width: 100px;