Remove document.rootScroller compositing clipping effects.

Remove document.rootScroller compositing clipping effects.

This is basically a revert of:
https://crrev.com/7ab964b30f73e3507ac3a424f56b1a9101b9bca3

Turns out that mucking with clips at the paint stage of the lifecycle is
problematic for document.rootScroller so I'm taking a different approach and
removing all the modifications to painting code.

BUG=505516
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2

Review-Url: https://codereview.chromium.org/2745063005
Cr-Commit-Position: refs/heads/master@{#456770}
Committed: https://chromium.googlesource.com/chromium/src/+/42c4d3b900752d93f6da6fb4f3dac6d367ac5727

[bokan, 2017-03-14 14:13:03]

Description was changed from

==========
Remove document.rootScroller compositing clipping effects.

This is basically a revert of:
https://crrev.com/7ab964b30f73e3507ac3a424f56b1a9101b9bca3

Turns out that mucking with clips at the paint stage of the lifecycle is
problematic for document.rootScroller so I'm taking a different approach and
removing all the modifications to painting code.

BUG=505516
==========

to

==========
Remove document.rootScroller compositing clipping effects.

This is basically a revert of:
https://crrev.com/7ab964b30f73e3507ac3a424f56b1a9101b9bca3

Turns out that mucking with clips at the paint stage of the lifecycle is
problematic for document.rootScroller so I'm taking a different approach and
removing all the modifications to painting code.

BUG=505516
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
==========

[bokan, 2017-03-14 14:13:23]

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

[commit-bot: I haz the power, 2017-03-14 14:13:38]

Dry run: 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, 2017-03-14 14:15:29]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-03-14 14:15:30]

Dry run: Try jobs failed on following builders:
  ios-device on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-device/builds...)
  ios-device-xcode-clang on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-device-xcode-...)
  ios-simulator on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-simulator/bui...)
  mac_chromium_compile_dbg_ng on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_comp...)
  mac_chromium_rel_ng on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[bokan, 2017-03-14 14:27:09]

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

[commit-bot: I haz the power, 2017-03-14 14:27:28]

Dry run: 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, 2017-03-14 14:35:17]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-03-14 14:35:18]

Dry run: Try jobs failed on following builders:
  linux_chromium_tsan_rel_ng on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[bokan, 2017-03-14 15:00:28]

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

[commit-bot: I haz the power, 2017-03-14 15:00:51]

Dry run: 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, 2017-03-14 16:44:49]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-03-14 16:44:50]

Dry run: This issue passed the CQ dry run.

[bokan, 2017-03-14 17:09:02]

Description was changed from

==========
Remove document.rootScroller compositing clipping effects.

This is basically a revert of:
https://crrev.com/7ab964b30f73e3507ac3a424f56b1a9101b9bca3

Turns out that mucking with clips at the paint stage of the lifecycle is
problematic for document.rootScroller so I'm taking a different approach and
removing all the modifications to painting code.

BUG=505516
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
==========

to

==========
Remove document.rootScroller compositing clipping effects.

This is basically a revert of:
https://crrev.com/7ab964b30f73e3507ac3a424f56b1a9101b9bca3

Turns out that mucking with clips at the paint stage of the lifecycle is
problematic for document.rootScroller so I'm taking a different approach and
removing all the modifications to painting code.

BUG=505516
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
==========

[bokan, 2017-03-14 17:09:02]

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

[bokan, 2017-03-14 17:12:07]

PTAL, I'm undoing all the compositing tweaks added for document.rootScroller in
favour of applying approprate style to the ancestors.

[chrishtr, 2017-03-14 18:26:41]

The CQ bit was checked by chrishtr@chromium.org

[chrishtr, 2017-03-14 18:26:41]

lgtm

[commit-bot: I haz the power, 2017-03-14 18:27:07]

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, 2017-03-14 18:35:29]

CQ is committing da patch.

Bot data: {"patchset_id": 40001, "attempt_start_ts": 1489516001214100,
"parent_rev": "89dcacd0a5b19051970fafaab3321338a50833b4", "commit_rev":
"42c4d3b900752d93f6da6fb4f3dac6d367ac5727"}

[commit-bot: I haz the power, 2017-03-14 18:36:26]

Description was changed from

==========
Remove document.rootScroller compositing clipping effects.

This is basically a revert of:
https://crrev.com/7ab964b30f73e3507ac3a424f56b1a9101b9bca3

Turns out that mucking with clips at the paint stage of the lifecycle is
problematic for document.rootScroller so I'm taking a different approach and
removing all the modifications to painting code.

BUG=505516
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
==========

to

==========
Remove document.rootScroller compositing clipping effects.

This is basically a revert of:
https://crrev.com/7ab964b30f73e3507ac3a424f56b1a9101b9bca3

Turns out that mucking with clips at the paint stage of the lifecycle is
problematic for document.rootScroller so I'm taking a different approach and
removing all the modifications to painting code.

BUG=505516
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2

Review-Url: https://codereview.chromium.org/2745063005
Cr-Commit-Position: refs/heads/master@{#456770}
Committed:
https://chromium.googlesource.com/chromium/src/+/42c4d3b900752d93f6da6fb4f3da...
==========

[commit-bot: I haz the power, 2017-03-14 18:36:27]

Committed patchset #3 (id:40001) as
https://chromium.googlesource.com/chromium/src/+/42c4d3b900752d93f6da6fb4f3da...