[wpt-sync] Sync PR 20141 - When performing subtree layout, perform scroll anchoring notifications on ancestors.
Categories
(Core :: Layout: Scrolling and Overflow, task, P4)
Tracking
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| Tracking | Status | |
|---|---|---|
| firefox72 | --- | fixed |
People
(Reporter: wpt-sync, Unassigned)
References
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Details
(Whiteboard: [wptsync downstream])
Sync web-platform-tests PR 20141 into mozilla-central (this bug is closed when the sync is complete).
PR: https://github.com/web-platform-tests/wpt/pull/20141
Details from upstream follow.
Chris Harrelson <chrishtr@chromium.org> wrote:
When performing subtree layout, perform scroll anchoring notifications on ancestors.
Previously, we would fail to call NotifyBeforeLayout for all such ancestors
that are scrollers, causing subtree layouts to completely fail to maintain
a scroll anchor for such ancestors.Bug: 920289
Change-Id: I899634949739f5d4f3af1f282b598cbc4ef0e3e4
Reviewed-on: https://chromium-review.googlesource.com/1902767
WPT-Export-Revision: 958aef40d6c10fd4e5586682fd738bc869ac68eb
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https://hg.mozilla.org/mozilla-central/rev/f50cd1448a61
https://hg.mozilla.org/mozilla-central/rev/c4759d9e9c34
Description
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