Remove logic forcing paint invalidation with non-composited scrollbars

Remove logic forcing paint invalidation with non-composited scrollbars

The logic has been unnecessary since we had PaintInvalidationCapableScrollableArea
which invalidates old and new visual rects of scrollbars.

This can reduce paint invalidation differences between RLS and non-RLS
about LayoutViews.

BUG=660195
TEST=paint/invalidation/resize-scrollable-div.html
TEST=paint/invalidation/scrollbar-invalidation-on-resize.html
TEST=paint/invalidation/scrollbar-invalidation-on-resize-with-border.html
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2

Committed: https://crrev.com/bf9526786aab6e8317e015249f88cca8b44cac35
Cr-Commit-Position: refs/heads/master@{#431927}

[Xianzhu, 2016-11-14 20:15:23]

Description was changed from

==========
Remove logic forcing paint invalidation with non-composited scrollbars

It's not necessary after we have PaintInvalidationCapableScrollableArea
which invalidates old and new visual rects of scrollbars.

BUG=660195
TEST=paint/invalidation/resize-scrollable-div.html
TEST=paint/invalidation/scrollbar-invalidation-on-resize.html
TEST=paint/invalidation/scrollbar-invalidation-on-resize-with-border.html
==========

to

==========
Remove logic forcing paint invalidation with non-composited scrollbars

It's not necessary after we have PaintInvalidationCapableScrollableArea
which invalidates old and new visual rects of scrollbars.

BUG=660195
TEST=paint/invalidation/resize-scrollable-div.html
TEST=paint/invalidation/scrollbar-invalidation-on-resize.html
TEST=paint/invalidation/scrollbar-invalidation-on-resize-with-border.html
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
==========

[Xianzhu, 2016-11-14 20:21:52]

Description was changed from

==========
Remove logic forcing paint invalidation with non-composited scrollbars

It's not necessary after we have PaintInvalidationCapableScrollableArea
which invalidates old and new visual rects of scrollbars.

BUG=660195
TEST=paint/invalidation/resize-scrollable-div.html
TEST=paint/invalidation/scrollbar-invalidation-on-resize.html
TEST=paint/invalidation/scrollbar-invalidation-on-resize-with-border.html
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
==========

to

==========
Remove logic forcing paint invalidation with non-composited scrollbars

The logic has been unnecessary since we had
PaintInvalidationCapableScrollableArea
which invalidates old and new visual rects of scrollbars.

This can reduce paint invalidation differences between RLS and non-RLS
about LayoutViews.

BUG=660195
TEST=paint/invalidation/resize-scrollable-div.html
TEST=paint/invalidation/scrollbar-invalidation-on-resize.html
TEST=paint/invalidation/scrollbar-invalidation-on-resize-with-border.html
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
==========

[Xianzhu, 2016-11-14 20:21:57]

The CQ bit was checked by wangxianzhu@chromium.org to run a CQ dry run

[Xianzhu, 2016-11-14 20:22:44]

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

[commit-bot: I haz the power, 2016-11-14 20:23:05]

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

[chrishtr, 2016-11-14 21:39:16]

lgtm

[Xianzhu, 2016-11-14 22:06:37]

The CQ bit was unchecked by wangxianzhu@chromium.org

[Xianzhu, 2016-11-14 22:06:41]

The CQ bit was checked by wangxianzhu@chromium.org

[commit-bot: I haz the power, 2016-11-14 22:07:54]

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, 2016-11-14 22:44:33]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-14 22:58:54]

Description was changed from

==========
Remove logic forcing paint invalidation with non-composited scrollbars

The logic has been unnecessary since we had
PaintInvalidationCapableScrollableArea
which invalidates old and new visual rects of scrollbars.

This can reduce paint invalidation differences between RLS and non-RLS
about LayoutViews.

BUG=660195
TEST=paint/invalidation/resize-scrollable-div.html
TEST=paint/invalidation/scrollbar-invalidation-on-resize.html
TEST=paint/invalidation/scrollbar-invalidation-on-resize-with-border.html
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
==========

to

==========
Remove logic forcing paint invalidation with non-composited scrollbars

The logic has been unnecessary since we had
PaintInvalidationCapableScrollableArea
which invalidates old and new visual rects of scrollbars.

This can reduce paint invalidation differences between RLS and non-RLS
about LayoutViews.

BUG=660195
TEST=paint/invalidation/resize-scrollable-div.html
TEST=paint/invalidation/scrollbar-invalidation-on-resize.html
TEST=paint/invalidation/scrollbar-invalidation-on-resize-with-border.html
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2

Committed: https://crrev.com/bf9526786aab6e8317e015249f88cca8b44cac35
Cr-Commit-Position: refs/heads/master@{#431927}
==========

[commit-bot: I haz the power, 2016-11-14 22:58:55]

Patchset 1 (id:??) landed as
https://crrev.com/bf9526786aab6e8317e015249f88cca8b44cac35
Cr-Commit-Position: refs/heads/master@{#431927}