Fix traverseNonCompositingDescendantsInPaintOrder for float-under-inline cases

Fix traverseNonCompositingDescendantsInPaintOrder for float-under-inline cases

We should traverse into composited inlines even if they are stacking
context, because there might be floating objects which belong to
ancestors in paint order.

During traverse for paint invalidation, when we encounter a floating
object, we should mark the real painting layer for paint invalidation
which may be above the tip of the subtree being traversed.

BUG=644144
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
TBR=wangxianzhu@chromium.org
NOTRY=true
NOPRESUBMIT=true

Review-Url: https://codereview.chromium.org/2639283003
Cr-Original-Commit-Position: refs/heads/master@{#445679}
Review-Url: https://codereview.chromium.org/2657853002
Cr-Commit-Position: refs/branch-heads/2987@{#87}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed: https://chromium.googlesource.com/chromium/src/+/246f4f0482e90289fd249360c558f9cee734f122

[Xianzhu, 2017-01-25 17:55:18]

The CQ bit was checked by wangxianzhu@chromium.org

[commit-bot: I haz the power, 2017-01-25 17:55:54]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-01-25 17:58:30]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1485366918373960, "parent_rev":
"fa8f94e282f6577b9b7b93e6a42a283f7f2015e4", "commit_rev":
"246f4f0482e90289fd249360c558f9cee734f122"}

[commit-bot: I haz the power, 2017-01-25 17:59:01]

Description was changed from

==========
Fix traverseNonCompositingDescendantsInPaintOrder for float-under-inline cases

We should traverse into composited inlines even if they are stacking
context, because there might be floating objects which belong to
ancestors in paint order.

During traverse for paint invalidation, when we encounter a floating
object, we should mark the real painting layer for paint invalidation
which may be above the tip of the subtree being traversed.

BUG=644144
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
TBR=wangxianzhu@chromium.org
NOTRY=true
NOPRESUBMIT=true

Review-Url: https://codereview.chromium.org/2639283003
Cr-Commit-Position: refs/heads/master@{#445679}
==========

to

==========
Fix traverseNonCompositingDescendantsInPaintOrder for float-under-inline cases

We should traverse into composited inlines even if they are stacking
context, because there might be floating objects which belong to
ancestors in paint order.

During traverse for paint invalidation, when we encounter a floating
object, we should mark the real painting layer for paint invalidation
which may be above the tip of the subtree being traversed.

BUG=644144
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
TBR=wangxianzhu@chromium.org
NOTRY=true
NOPRESUBMIT=true

Review-Url: https://codereview.chromium.org/2639283003
Cr-Original-Commit-Position: refs/heads/master@{#445679}
Review-Url: https://codereview.chromium.org/2657853002
Cr-Commit-Position: refs/branch-heads/2987@{#87}
Cr-Branched-From:
ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed:
https://chromium.googlesource.com/chromium/src/+/246f4f0482e90289fd249360c558...
==========

[commit-bot: I haz the power, 2017-01-25 17:59:01]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/246f4f0482e90289fd249360c558...