Fixed-position elements should not be clipped by ancestor fixed-position overflow clip

Fixed-position elements should not be clipped by ancestor fixed-position overflow clip

The behavior was divergent between WebKit and Mozilla. Blink used to match
WebKit behavior, but now its non-compositing code path matches Mozilla.
The compositing code path should match the non-compositing one.

BUG=600605
TEST=compositing/overflow/fixed-element-escape-fixed-overflow-clip.html

Committed: https://crrev.com/8fa1bf1541ea2a52b8c2a6717ab135eac7c02471
Cr-Commit-Position: refs/heads/master@{#388426}

[trchen, 2016-04-20 01:33:44]

Description was changed from

==========
Fixed-position elements should not be clipped by ancestor fixed-position
overflow clip

The behavior was divergent between WebKit and Mozilla. Blink used to match
WebKit behavior, but now its non-compositing code path matches Mozilla.
The compositing code path should match the non-compositing one.

BUG=600605
TEST=compositing/overflow/fixed-element-escape-fixed-overflow-clip.html
==========

to

==========
Fixed-position elements should not be clipped by ancestor fixed-position
overflow clip

The behavior was divergent between WebKit and Mozilla. Blink used to match
WebKit behavior, but now its non-compositing code path matches Mozilla.
The compositing code path should match the non-compositing one.

BUG=600605
TEST=compositing/overflow/fixed-element-escape-fixed-overflow-clip.html
==========

[trchen, 2016-04-20 01:33:44]

trchen@chromium.org changed reviewers:
+ vollick@chromium.org

[trchen, 2016-04-20 01:33:52]

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

[commit-bot: I haz the power, 2016-04-20 01:34:19]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1898393002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1898393002/1

[Ian Vollick, 2016-04-20 02:10:28]

On 2016/04/20 01:35:56, trchen wrote:
lgtm.

[commit-bot: I haz the power, 2016-04-20 03:09:26]

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

[commit-bot: I haz the power, 2016-04-20 03:09:27]

Dry run: This issue passed the CQ dry run.

[trchen, 2016-04-20 03:53:12]

The CQ bit was checked by trchen@chromium.org

[commit-bot: I haz the power, 2016-04-20 03:53:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1898393002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1898393002/1

[commit-bot: I haz the power, 2016-04-20 03:57:56]

Description was changed from

==========
Fixed-position elements should not be clipped by ancestor fixed-position
overflow clip

The behavior was divergent between WebKit and Mozilla. Blink used to match
WebKit behavior, but now its non-compositing code path matches Mozilla.
The compositing code path should match the non-compositing one.

BUG=600605
TEST=compositing/overflow/fixed-element-escape-fixed-overflow-clip.html
==========

to

==========
Fixed-position elements should not be clipped by ancestor fixed-position
overflow clip

The behavior was divergent between WebKit and Mozilla. Blink used to match
WebKit behavior, but now its non-compositing code path matches Mozilla.
The compositing code path should match the non-compositing one.

BUG=600605
TEST=compositing/overflow/fixed-element-escape-fixed-overflow-clip.html
==========

[commit-bot: I haz the power, 2016-04-20 03:57:57]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-22 19:20:52]

Description was changed from

==========
Fixed-position elements should not be clipped by ancestor fixed-position
overflow clip

The behavior was divergent between WebKit and Mozilla. Blink used to match
WebKit behavior, but now its non-compositing code path matches Mozilla.
The compositing code path should match the non-compositing one.

BUG=600605
TEST=compositing/overflow/fixed-element-escape-fixed-overflow-clip.html
==========

to

==========
Fixed-position elements should not be clipped by ancestor fixed-position
overflow clip

The behavior was divergent between WebKit and Mozilla. Blink used to match
WebKit behavior, but now its non-compositing code path matches Mozilla.
The compositing code path should match the non-compositing one.

BUG=600605
TEST=compositing/overflow/fixed-element-escape-fixed-overflow-clip.html

Committed: https://crrev.com/8fa1bf1541ea2a52b8c2a6717ab135eac7c02471
Cr-Commit-Position: refs/heads/master@{#388426}
==========

[commit-bot: I haz the power, 2016-04-22 19:20:53]

Patchset 1 (id:??) landed as
https://crrev.com/8fa1bf1541ea2a52b8c2a6717ab135eac7c02471
Cr-Commit-Position: refs/heads/master@{#388426}