Avoid synchronous stylesheet update on html import loaded.

Avoid synchronous stylesheet update on html import loaded.

A use counter was updating the styleSheets list, which updated all of
active style to figure out if an html import contains stylesheets.
Instead, do a simpler walk of the stylesheet candidate nodes and return
early if one of them has a sheet, or a sheet load is in progress.

BUG=717506
Review-Url: https://codereview.chromium.org/2882983002
Cr-Commit-Position: refs/heads/master@{#472139}
Committed: https://chromium.googlesource.com/chromium/src/+/9d4c419700c0edc7602c27d29a5b520f00bbe13a

[rune, 2017-05-15 09:24:47]

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

[commit-bot: I haz the power, 2017-05-15 09:24:57]

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, 2017-05-15 10:15:57]

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

[commit-bot: I haz the power, 2017-05-15 10:15:58]

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

[rune, 2017-05-15 14:21:18]

rune@opera.com changed reviewers:
+ meade@chromium.org

[rune, 2017-05-15 14:21:19]

ptal

[meade_UTC10, 2017-05-16 07:06:46]

lgtm

[rune, 2017-05-16 08:00:51]

The CQ bit was checked by rune@opera.com

[commit-bot: I haz the power, 2017-05-16 08:01:08]

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, 2017-05-16 08:09:20]

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

[commit-bot: I haz the power, 2017-05-16 08:09:21]

Try jobs failed on following builders:
  chromium_presubmit on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[rune, 2017-05-16 08:17:24]

rune@opera.com changed reviewers:
+ jochen@chromium.org

[rune, 2017-05-16 08:17:24]

jochen@ for web/

[jochen (gone - plz use gerrit), 2017-05-16 11:16:13]

lgtm

[rune, 2017-05-16 11:31:12]

The CQ bit was checked by rune@opera.com

[commit-bot: I haz the power, 2017-05-16 11:31:52]

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, 2017-05-16 12:28:11]

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

[commit-bot: I haz the power, 2017-05-16 12:28:13]

Try jobs failed on following builders:
  ios-simulator on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-simulator/bui...)

[rune, 2017-05-16 13:09:42]

The CQ bit was checked by rune@opera.com

[commit-bot: I haz the power, 2017-05-16 13:10:04]

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, 2017-05-16 17:10:06]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1494940182052520, "parent_rev":
"4a79f66a7649512ba0e1cebd1e1d3c3cccb1bdc1", "commit_rev":
"9d4c419700c0edc7602c27d29a5b520f00bbe13a"}

[commit-bot: I haz the power, 2017-05-16 17:10:17]

Description was changed from

==========
Avoid synchronous stylesheet update on html import loaded.

A use counter was updating the styleSheets list, which updated all of
active style to figure out if an html import contains stylesheets.
Instead, do a simpler walk of the stylesheet candidate nodes and return
early if one of them has a sheet, or a sheet load is in progress.

BUG=717506
==========

to

==========
Avoid synchronous stylesheet update on html import loaded.

A use counter was updating the styleSheets list, which updated all of
active style to figure out if an html import contains stylesheets.
Instead, do a simpler walk of the stylesheet candidate nodes and return
early if one of them has a sheet, or a sheet load is in progress.

BUG=717506

Review-Url: https://codereview.chromium.org/2882983002
Cr-Commit-Position: refs/heads/master@{#472139}
Committed:
https://chromium.googlesource.com/chromium/src/+/9d4c419700c0edc7602c27d29a5b...
==========

[commit-bot: I haz the power, 2017-05-16 17:10:18]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/9d4c419700c0edc7602c27d29a5b...