Return the enclosing composited PaintLayer rather than containingBlock for floats.

Return the enclosing composited PaintLayer rather than containingBlock for floats.

A previous patch failed to return the composited PaintLayer, which is what
GraphicsLayerUpdater expected.

BUG=679667
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2

Review-Url: https://codereview.chromium.org/2624843002
Cr-Commit-Position: refs/heads/master@{#442778}
(cherry picked from commit e00ffecc157dfa92f60c583cd3bfab7f102b65ae)

Review-Url: https://codereview.chromium.org/2621343003 .
Cr-Commit-Position: refs/branch-heads/2978@{#3}
Cr-Branched-From: e2867aed46b3f00f3735d310144d6ef638f8be1a-refs/heads/master@{#442756}
Committed: https://chromium.googlesource.com/chromium/src/+/e9d7b27fb83ad0bfcdc303d5228c5a51d68f526e

[chrishtr, 2017-01-11 18:25:47]

Description was changed from

==========
Return the enclosing composited PaintLayer rather than containingBlock for
floats.

A previous patch failed to return the composited PaintLayer, which is what
GraphicsLayerUpdater expected.

BUG=679667
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2

Review-Url: https://codereview.chromium.org/2624843002
Cr-Commit-Position: refs/heads/master@{#442778}
(cherry picked from commit e00ffecc157dfa92f60c583cd3bfab7f102b65ae)
==========

to

==========
Return the enclosing composited PaintLayer rather than containingBlock for
floats.

A previous patch failed to return the composited PaintLayer, which is what
GraphicsLayerUpdater expected.

BUG=679667
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2

Review-Url: https://codereview.chromium.org/2624843002
Cr-Commit-Position: refs/heads/master@{#442778}
(cherry picked from commit e00ffecc157dfa92f60c583cd3bfab7f102b65ae)

Review-Url: https://codereview.chromium.org/2621343003 .
Cr-Commit-Position: refs/branch-heads/2978@{#3}
Cr-Branched-From:
e2867aed46b3f00f3735d310144d6ef638f8be1a-refs/heads/master@{#442756}
Committed:
https://chromium.googlesource.com/chromium/src/+/e9d7b27fb83ad0bfcdc303d5228c...
==========

[chrishtr, 2017-01-11 18:25:48]

Committed patchset #1 (id:1) manually as
e9d7b27fb83ad0bfcdc303d5228c5a51d68f526e.