A container of out-of-flow positioned descendants should be an offsetParent.

A container of out-of-flow positioned descendants should be an offsetParent.

This reflects a recent spec change [1]. Previously, the condition was that the
position property be different from 'static', but it's unreasonable that we
shouldn't also include other objects that serve as containing blocks for fixed
and absolutely positioned descendants, such as "transform". Gecko and Edge
already have this behavior.

[1] https://github.com/w3c/csswg-drafts/commit/180b348a1ac0931043cd195651fc5164463d2bce

BUG=645397
Committed: https://crrev.com/69f0712961a7ec8aedcd3ee724fa23c1aa8175fc
Cr-Commit-Position: refs/heads/master@{#417903}

[mstensho (USE GERRIT), 2016-09-09 11:21:37]

The CQ bit was checked by mstensho@opera.com to run a CQ dry run

[commit-bot: I haz the power, 2016-09-09 11:21:52]

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, 2016-09-09 12:46:36]

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

[commit-bot: I haz the power, 2016-09-09 12:46:37]

Dry run: Try jobs failed on following builders:
  win_chromium_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

[mstensho (USE GERRIT), 2016-09-12 08:25:11]

The CQ bit was checked by mstensho@opera.com to run a CQ dry run

[commit-bot: I haz the power, 2016-09-12 08:25:26]

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, 2016-09-12 09:42:25]

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

[commit-bot: I haz the power, 2016-09-12 09:42:25]

Dry run: This issue passed the CQ dry run.

[mstensho (USE GERRIT), 2016-09-12 09:44:52]

mstensho@opera.com changed reviewers:
+ wangxianzhu@chromium.org

[rune, 2016-09-12 09:49:08]

rune@opera.com changed reviewers:
+ rune@opera.com

[rune, 2016-09-12 09:49:09]

lgtm

[mstensho (USE GERRIT), 2016-09-12 09:51:07]

The CQ bit was checked by mstensho@opera.com

[commit-bot: I haz the power, 2016-09-12 09:51:21]

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, 2016-09-12 09:54:41]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-12 09:56:36]

Description was changed from

==========
A container of out-of-flow positioned descendants should be an offsetParent.

This reflects a recent spec change [1]. Previously, the condition was that the
position property be different from 'static', but it's unreasonable that we
shouldn't also include other objects that serve as containing blocks for fixed
and absolutely positioned descendants, such as "transform". Gecko and Edge
already have this behavior.

[1]
https://github.com/w3c/csswg-drafts/commit/180b348a1ac0931043cd195651fc516446...

BUG=645397
==========

to

==========
A container of out-of-flow positioned descendants should be an offsetParent.

This reflects a recent spec change [1]. Previously, the condition was that the
position property be different from 'static', but it's unreasonable that we
shouldn't also include other objects that serve as containing blocks for fixed
and absolutely positioned descendants, such as "transform". Gecko and Edge
already have this behavior.

[1]
https://github.com/w3c/csswg-drafts/commit/180b348a1ac0931043cd195651fc516446...

BUG=645397

Committed: https://crrev.com/69f0712961a7ec8aedcd3ee724fa23c1aa8175fc
Cr-Commit-Position: refs/heads/master@{#417903}
==========

[commit-bot: I haz the power, 2016-09-12 09:56:38]

Patchset 1 (id:??) landed as
https://crrev.com/69f0712961a7ec8aedcd3ee724fa23c1aa8175fc
Cr-Commit-Position: refs/heads/master@{#417903}