1526422 - [wpt-sync] Sync PR 15168 - [PE] Update background obscuration and check for change during PrePaint

Status: RESOLVED FIXED

(Core :: Layout, enhancement, P4)

Description

[Web Platform Test Sync Bot (Matrix: #interop:mozilla.org)]

Sync web-platform-tests PR 15168 into mozilla-central (this bug is closed when the sync is complete).

PR: https://github.com/web-platform-tests/wpt/pull/15168
Details from upstream follow.

Xianzhu Wang <[e-mail]> wrote:

[PE] Update background obscuration and check for change during PrePaint

Background obscuration status is affected by many factors. Previously
we cached the status, but invalidation of the cache was not complete,
and it was difficult to keep it complete.

Now we update background obscuration status during PrePaint, whenever
the object is marked for any reason for PrePaintTreeWalk, which should
cover all conditions that cause background obscuration change.

Bug: 916050
Change-Id: Id044c9e724940f7a83c8dfc1aca8f3dde3526e96
Reviewed-on: https://chromium-review.googlesource.com/c/1444300
Commit-Queue: Xianzhu Wang \<[e-mail]>
Reviewed-by: Chris Harrelson \<[e-mail]>
Cr-Commit-Position: refs/heads/master@{#627993}

Comment 1

[Web Platform Test Sync Bot (Matrix: #interop:mozilla.org)]

Pushed to try https://treeherder.mozilla.org/#/jobs?repo=try&revision=cc3c2856f1b69c4518fb465e37b62d70c37e561c

Comment 2

[Web Platform Test Sync Bot (Matrix: #interop:mozilla.org)]

Pushed to try (stability) https://treeherder.mozilla.org/#/jobs?repo=try&revision=18fc81a4af81f4363234c4a309b734a1eb44f2fb

Comment 3

[Web Platform Test Sync Bot (Matrix: #interop:mozilla.org)]

Ran 1 tests
PASS   : 1

Comment 4

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/mozilla-inbound/rev/c23a93169e07
[wpt PR 15168] - [PE] Update background obscuration and check for change during PrePaint, a=testonly

Comment 5

[Daniel Varga [:dvarga]]

https://hg.mozilla.org/mozilla-central/rev/c23a93169e07