GitLab

This reverts commit 206bdc85.

Reason for revert:

Several paint-related tests have begun crashing on "Linux Trusty (dbg)" after landing this patch, flakily hitting a CHECK in
`PaintController.cpp` (see the log in 
https://storage.googleapis.com/chromium-layout-test-archives/WebKit_Linux_Trusty__dbg_/5565/layout-test-results/paint/invalidation/video-mute-repaint-stderr.txt).
It looks like this kind of crash happened while landing the patch as
well, at least on https://storage.googleapis.com/chromium-layout-test-archives/linux_layout_tests_slimming_paint_v2/6682/layout-test-results/results.html).
I'll revert it.


Original change's description:
> Fix false-positives of under-invalidation checking in layout tests
> 
> In the following few cases we intentionally allow under-invalidations in
> cached subsequences:
> - offscreen image animation
> - media buffered range
> 
> We intentionally don't update each time the contents change to improve
> performance or avoid complex implementation of real time change
> notification.
> 
> Now allow cache skipping in cached subsequences.
> 
> Enable under-invalidation checking for tests that would have reported
> under-invalidation with the checking enabled.
> 
> This also helps clusterfuzz not to trigger under-invaldiation checking
> failures when it creates a test for the above cases.
> 
> Bug: 769729
> Cq-Include-Trybots: master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
> Change-Id: I2149e9d2304dbad5d7486c822d5452c5dba237fe
> Reviewed-on: https://chromium-review.googlesource.com/690851
> Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
> Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#505281}

TBR=wangxianzhu@chromium.org,chrishtr@chromium.org

Change-Id: Id0ddbc90d9cf4436fe10dc81485d9f13edef6f1a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 769729, 769879
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
Reviewed-on: https://chromium-review.googlesource.com/691814Reviewed-by: Mike West <mkwst@chromium.org>
Commit-Queue: Mike West <mkwst@chromium.org>
Cr-Commit-Position: refs/heads/master@{#505327}