Make browser GPU channel creation async.

Make browser GPU channel creation async.

This may help startup time.

Committed: https://crrev.com/1a7a51295cc29a237a078ac614b68bd2948af894
Cr-Commit-Position: refs/heads/master@{#301512}

[jbauman, 2014-10-14 20:14:02]

jbauman@chromium.org changed reviewers:
+ piman@chromium.org

[piman, 2014-10-14 20:21:30]

lgtm

[jbauman, 2014-10-14 20:25:40]

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

[jbauman, 2014-10-14 20:25:40]

Also, jamesr@ for OWNERS review of mojo/

[jamesr, 2014-10-14 20:32:52]

mojo/ lgtm

[jbauman, 2014-10-15 02:32:50]

The CQ bit was checked by jbauman@chromium.org

[commit-bot: I haz the power, 2014-10-15 02:33:52]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/648413004/40001

[commit-bot: I haz the power, 2014-10-15 03:23:27]

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

[commit-bot: I haz the power, 2014-10-15 03:23:28]

Try jobs failed on following builders:
  mac_gpu_retina_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/mac_gpu_retina_tr...)

[jbauman, 2014-10-27 23:06:39]

The CQ bit was checked by jbauman@chromium.org

[commit-bot: I haz the power, 2014-10-27 23:09:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/648413004/60001

[commit-bot: I haz the power, 2014-10-28 00:23:06]

Committed patchset #4 (id:60001)

[commit-bot: I haz the power, 2014-10-28 00:23:49]

Patchset 4 (id:??) landed as
https://crrev.com/1a7a51295cc29a237a078ac614b68bd2948af894
Cr-Commit-Position: refs/heads/master@{#301512}