This makes us pass WPT test contain-layout-baseline-004.html (i.e. it makes us treat one table cell as having no baseline, so we align its bottom edge with the other cell's baseline, as the test expects). This is required by the spec text at [1] which excludes most table parts but includes table cells, and says "the containing element is treated as having no baseline"). [1] https://drafts.csswg.org/css-contain/#containment-layout
Bug 1563050 Comment 2 Edit History
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This makes us pass WPT test contain-layout-baseline-004.html (i.e. it makes us treat one table cell as having no baseline, so we align its bottom edge with the other cell's baseline, as the test expects). This is required by the spec text at [1] which excludes most table parts but includes table cells, and says "the containing element is treated as having no baseline"). [1] https://drafts.csswg.org/css-contain/#containment-layout