Fix wrong paint invalidation container for column spanners

Fix wrong paint invalidation container for column spanners

If a column spanner is under a composited column content, it doesn't
paint onto this composited column content because it belongs to the
column container in paint order.

This regressed since https://codereview.chromium.org/2615203002.

BUG=698216
TBR=wangxianzhu@chromium.org
NOTRY=true
NOPRESUBMIT=true
TEST=paint/invalidation/compositing/column-span-under-composited-column-child.html
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2

Review-Url: https://codereview.chromium.org/2736373003
Cr-Original-Commit-Position: refs/heads/master@{#455841}
Review-Url: https://codereview.chromium.org/2740103004
Cr-Commit-Position: refs/branch-heads/3029@{#113}
Cr-Branched-From: 939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed: https://chromium.googlesource.com/chromium/src/+/52520d1f00753da9adafc914b4856ed9052e3678

[Xianzhu, 2017-03-10 17:45:23]

The CQ bit was checked by wangxianzhu@chromium.org

[commit-bot: I haz the power, 2017-03-10 17:45:51]

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, 2017-03-10 17:47:38]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1489167923148490, "parent_rev":
"df154b0f0305d236a6d71a63a6a120bfe55b3bec", "commit_rev":
"52520d1f00753da9adafc914b4856ed9052e3678"}

[commit-bot: I haz the power, 2017-03-10 17:48:14]

Description was changed from

==========
Fix wrong paint invalidation container for column spanners

If a column spanner is under a composited column content, it doesn't
paint onto this composited column content because it belongs to the
column container in paint order.

This regressed since https://codereview.chromium.org/2615203002.

BUG=698216
TBR=wangxianzhu@chromium.org
NOTRY=true
NOPRESUBMIT=true
TEST=paint/invalidation/compositing/column-span-under-composited-column-child.html
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2

Review-Url: https://codereview.chromium.org/2736373003
Cr-Commit-Position: refs/heads/master@{#455841}
==========

to

==========
Fix wrong paint invalidation container for column spanners

If a column spanner is under a composited column content, it doesn't
paint onto this composited column content because it belongs to the
column container in paint order.

This regressed since https://codereview.chromium.org/2615203002.

BUG=698216
TBR=wangxianzhu@chromium.org
NOTRY=true
NOPRESUBMIT=true
TEST=paint/invalidation/compositing/column-span-under-composited-column-child.html
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2

Review-Url: https://codereview.chromium.org/2736373003
Cr-Original-Commit-Position: refs/heads/master@{#455841}
Review-Url: https://codereview.chromium.org/2740103004
Cr-Commit-Position: refs/branch-heads/3029@{#113}
Cr-Branched-From:
939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed:
https://chromium.googlesource.com/chromium/src/+/52520d1f00753da9adafc914b485...
==========

[commit-bot: I haz the power, 2017-03-10 17:48:15]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/52520d1f00753da9adafc914b485...