Introduce setNeedsActiveStyleUpdate for adding/removing stylesheets.

Introduce setNeedsActiveStyleUpdate for adding/removing stylesheets.

Remove the add/remove/modify methods which did not have different
implementations anyway. The plan is to let the async active stylesheet
update detect which StyleSheetContents have been added and which have
been removed and invalidate style and caches accordingly.

I've started to write up the plan here: http://bit.ly/25uxtnU

BUG=567021
Committed: https://crrev.com/8d5bee68bf505c4c0c4e1369d3a28d7ce021a6ef
Cr-Commit-Position: refs/heads/master@{#384008}

[rune, 2016-03-29 17:29:56]

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

[commit-bot: I haz the power, 2016-03-29 17:30:09]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1843693002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1843693002/1

[commit-bot: I haz the power, 2016-03-29 18:56:59]

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

[commit-bot: I haz the power, 2016-03-29 18:57:00]

Dry run: This issue passed the CQ dry run.

[dglazkov, 2016-03-30 16:45:46]

dglazkov@chromium.org changed reviewers:
+ dglazkov@chromium.org

[dglazkov, 2016-03-30 16:45:47]

lgtm

[rune, 2016-03-30 16:47:39]

The CQ bit was checked by rune@opera.com

[commit-bot: I haz the power, 2016-03-30 16:48:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1843693002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1843693002/1

[commit-bot: I haz the power, 2016-03-30 16:53:16]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-30 16:55:08]

Description was changed from

==========
Introduce setNeedsActiveStyleUpdate for adding/removing stylesheets.

Remove the add/remove/modify methods which did not have different
implementations anyway. The plan is to let the async active stylesheet
update detect which StyleSheetContents have been added and which have
been removed and invalidate style and caches accordingly.

I've started to write up the plan here: http://bit.ly/25uxtnU

BUG=567021
==========

to

==========
Introduce setNeedsActiveStyleUpdate for adding/removing stylesheets.

Remove the add/remove/modify methods which did not have different
implementations anyway. The plan is to let the async active stylesheet
update detect which StyleSheetContents have been added and which have
been removed and invalidate style and caches accordingly.

I've started to write up the plan here: http://bit.ly/25uxtnU

BUG=567021

Committed: https://crrev.com/8d5bee68bf505c4c0c4e1369d3a28d7ce021a6ef
Cr-Commit-Position: refs/heads/master@{#384008}
==========

[commit-bot: I haz the power, 2016-03-30 16:55:09]

Patchset 1 (id:??) landed as
https://crrev.com/8d5bee68bf505c4c0c4e1369d3a28d7ce021a6ef
Cr-Commit-Position: refs/heads/master@{#384008}