Forward compositor and input tasks to the Blink scheduler

Forward compositor and input tasks to the Blink scheduler

The re-entrancy issues with the Blink scheduler have been resolved, so
we can forward compositor and input tasks to it again -- if the
scheduler is enabled.

Depends on https://codereview.chromium.org/621363002.

BUG=391005
TEST=No instances of "Scheduler::executeHighPriorityTasks" found
in trace when running chrome with --disable-blink-scheduler.

Committed: https://crrev.com/c30aa408450d0fd3713ec6d7775b9c801731ed7e
Cr-Commit-Position: refs/heads/master@{#299105}

[Sami, 2014-10-06 17:05:23]

skyostil@chromium.org changed reviewers:
+ jamesr@chromium.org

[Sami, 2014-10-06 17:23:21]

skyostil@chromium.org changed reviewers:
+ alexclarke@chromium.org, petrcermak@chromium.org, picksi@chromium.org

[Sami, 2014-10-06 17:23:21]

The Blink scheduler is now running in pass-through mode while we figure out the
best way to coexist with base::MessageLoop. We'd like to turn it on in the mean
time since it'll still improve the queueing_durations metric and to gather some
more data.

[Sami, 2014-10-07 09:40:46]

skyostil@chromium.org changed reviewers:
- alexclarke@chromium.org, petrcermak@chromium.org, picksi@chromium.org

[Sami, 2014-10-08 11:11:27]

Ping?

[picksi1, 2014-10-08 12:44:37]

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

[picksi1, 2014-10-08 12:44:38]

https://codereview.chromium.org/629243003/diff/1/content/renderer/render_thre...
File content/renderer/render_thread_impl.cc (right):

https://codereview.chromium.org/629243003/diff/1/content/renderer/render_thre...
content/renderer/render_thread_impl.cc:858: 
Stylistic Nit: I'd favor swapping the if/else and removing the '!'

[Sami, 2014-10-08 12:54:32]

https://codereview.chromium.org/629243003/diff/1/content/renderer/render_thre...
File content/renderer/render_thread_impl.cc (right):

https://codereview.chromium.org/629243003/diff/1/content/renderer/render_thre...
content/renderer/render_thread_impl.cc:858: 
On 2014/10/08 12:44:37, picksi1 wrote:
> Stylistic Nit: I'd favor swapping the if/else and removing the '!'

Done.

[Sami, 2014-10-09 16:25:29]

skyostil@chromium.org changed reviewers:
+ jochen@chromium.org

[Sami, 2014-10-09 16:26:03]

jochen@, could you have a look?

[jochen (gone - plz use gerrit), 2014-10-10 11:10:29]

lgtm

[Sami, 2014-10-10 12:43:10]

The CQ bit was checked by skyostil@chromium.org

[commit-bot: I haz the power, 2014-10-10 12:44:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/629243003/20001

[commit-bot: I haz the power, 2014-10-10 13:49:17]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2014-10-10 13:49:55]

Patchset 2 (id:??) landed as
https://crrev.com/c30aa408450d0fd3713ec6d7775b9c801731ed7e
Cr-Commit-Position: refs/heads/master@{#299105}