Removed unnecessary rule feature reset when no ScopedStyleResolver.

Removed unnecessary rule feature reset when no ScopedStyleResolver.

Resetting rule features when a shadow tree did not contain any
stylesheets, and hence didn't have a ScopedStyleResolver, caused a
performance regression in the select-single-remove performance test.

UA shadow trees typically don't have any stylesheets.

This is a regression from [1].

[1] https://codereview.chromium.org/2443933002

R=meade@chromium.org
BUG=659535
TEST=PerformanceTests/DOM/select-single-remove.html

Committed: https://crrev.com/72f115c8f71b04929130f9a71ff9f217cb8cbc4f
Cr-Commit-Position: refs/heads/master@{#427949}

[rune, 2016-10-26 13:17:59]

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

[commit-bot: I haz the power, 2016-10-26 13:18:11]

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

[rune, 2016-10-26 14:22:51]

ptal

[commit-bot: I haz the power, 2016-10-26 14:34:39]

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

[commit-bot: I haz the power, 2016-10-26 14:34:40]

Dry run: This issue passed the CQ dry run.

[meade_UTC10, 2016-10-27 04:43:14]

lgtm

[rune, 2016-10-27 05:50:45]

The CQ bit was checked by rune@opera.com

[commit-bot: I haz the power, 2016-10-27 05:50:58]

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, 2016-10-27 05:55:39]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-27 05:57:31]

Description was changed from

==========
Removed unnecessary rule feature reset when no ScopedStyleResolver.

Resetting rule features when a shadow tree did not contain any
stylesheets, and hence didn't have a ScopedStyleResolver, caused a
performance regression in the select-single-remove performance test.

UA shadow trees typically don't have any stylesheets.

This is a regression from [1].

[1] https://codereview.chromium.org/2443933002

R=meade@chromium.org
BUG=659535
TEST=PerformanceTests/DOM/select-single-remove.html
==========

to

==========
Removed unnecessary rule feature reset when no ScopedStyleResolver.

Resetting rule features when a shadow tree did not contain any
stylesheets, and hence didn't have a ScopedStyleResolver, caused a
performance regression in the select-single-remove performance test.

UA shadow trees typically don't have any stylesheets.

This is a regression from [1].

[1] https://codereview.chromium.org/2443933002

R=meade@chromium.org
BUG=659535
TEST=PerformanceTests/DOM/select-single-remove.html

Committed: https://crrev.com/72f115c8f71b04929130f9a71ff9f217cb8cbc4f
Cr-Commit-Position: refs/heads/master@{#427949}
==========

[commit-bot: I haz the power, 2016-10-27 05:57:31]

Patchset 1 (id:??) landed as
https://crrev.com/72f115c8f71b04929130f9a71ff9f217cb8cbc4f
Cr-Commit-Position: refs/heads/master@{#427949}