Fix paint invalidation rect of LayoutView

Fix paint invalidation rect of LayoutView

The bug was caused by http://crrev.com/1929413002 which uses
selfVisualOverflowRect() instead of visualOverflowRect() to calculate
paint invalidation rect. It caused wrong paint invalidation rect
for LayoutView.

Before rootLayerScrolls is launched, LayoutView's overflow model is
special. We should calculate its paint invalidation rect based on its
special visualOverflowRect() for now.

BUG=611046
Committed: https://crrev.com/c053f70ee05c2dd91bf8b9da324e2a631e356bdc
Cr-Commit-Position: refs/heads/master@{#393099}

[Xianzhu, 2016-05-11 20:58:03]

Description was changed from

==========
Fix paint invalidation rect of LayoutView

Before rootLayerScrolls is launched, LayoutView's overflow model is
special. We should calculate its paint invalidation rect based on its
special visualOverflowRect() for now.

BUG=611046
==========

to

==========
Fix paint invalidation rect of LayoutView

The bug was caused by http://crrev.com/1929413002 which uses
selfVisualOverflowRect() instead of visualOverflowRect() to calculate
paint invalidation rect. It caused wrong paint invalidation rect
for LayoutView.

Before rootLayerScrolls is launched, LayoutView's overflow model is
special. We should calculate its paint invalidation rect based on its
special visualOverflowRect() for now.

BUG=611046
==========

[Xianzhu, 2016-05-11 20:58:18]

wangxianzhu@chromium.org changed reviewers:
+ chrishtr@chromium.org, trchen@chromium.org

[Xianzhu, 2016-05-11 20:59:35]

For the try bot layout test failures, the actual results are like the expected
results before the auto-rebaseline for http://crrev.com/1929413002. Will add
NeedsRebaseline for them in the next patch set.

[trchen, 2016-05-11 22:18:30]

Makes sense to me. lgtm.

[Xianzhu, 2016-05-11 22:20:00]

The CQ bit was checked by wangxianzhu@chromium.org

[commit-bot: I haz the power, 2016-05-11 22:20:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1971843002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1971843002/20001

[commit-bot: I haz the power, 2016-05-11 23:12:10]

Description was changed from

==========
Fix paint invalidation rect of LayoutView

The bug was caused by http://crrev.com/1929413002 which uses
selfVisualOverflowRect() instead of visualOverflowRect() to calculate
paint invalidation rect. It caused wrong paint invalidation rect
for LayoutView.

Before rootLayerScrolls is launched, LayoutView's overflow model is
special. We should calculate its paint invalidation rect based on its
special visualOverflowRect() for now.

BUG=611046
==========

to

==========
Fix paint invalidation rect of LayoutView

The bug was caused by http://crrev.com/1929413002 which uses
selfVisualOverflowRect() instead of visualOverflowRect() to calculate
paint invalidation rect. It caused wrong paint invalidation rect
for LayoutView.

Before rootLayerScrolls is launched, LayoutView's overflow model is
special. We should calculate its paint invalidation rect based on its
special visualOverflowRect() for now.

BUG=611046
==========

[commit-bot: I haz the power, 2016-05-11 23:12:11]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-05-11 23:13:58]

Description was changed from

==========
Fix paint invalidation rect of LayoutView

The bug was caused by http://crrev.com/1929413002 which uses
selfVisualOverflowRect() instead of visualOverflowRect() to calculate
paint invalidation rect. It caused wrong paint invalidation rect
for LayoutView.

Before rootLayerScrolls is launched, LayoutView's overflow model is
special. We should calculate its paint invalidation rect based on its
special visualOverflowRect() for now.

BUG=611046
==========

to

==========
Fix paint invalidation rect of LayoutView

The bug was caused by http://crrev.com/1929413002 which uses
selfVisualOverflowRect() instead of visualOverflowRect() to calculate
paint invalidation rect. It caused wrong paint invalidation rect
for LayoutView.

Before rootLayerScrolls is launched, LayoutView's overflow model is
special. We should calculate its paint invalidation rect based on its
special visualOverflowRect() for now.

BUG=611046

Committed: https://crrev.com/c053f70ee05c2dd91bf8b9da324e2a631e356bdc
Cr-Commit-Position: refs/heads/master@{#393099}
==========

[commit-bot: I haz the power, 2016-05-11 23:13:59]

Patchset 2 (id:??) landed as
https://crrev.com/c053f70ee05c2dd91bf8b9da324e2a631e356bdc
Cr-Commit-Position: refs/heads/master@{#393099}