Remove the --ui-enable-threaded-compositing flag.

Remove the --ui-enable-threaded-compositing flag.

We're not planning to enable this on any new platforms, so we can just
hardcode it off when not on ChromeOS. Leaving the disable flag for
ChromeOS for now, as we're working on disabling that code path there.

R=piman
BUG=

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=251896

[piman, 2014-02-15 00:19:25]

lgtm

[danakj, 2014-02-15 00:27:38]

The CQ bit was checked by danakj@chromium.org

[commit-bot: I haz the power, 2014-02-15 00:39:11]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/danakj@chromium.org/167973003/1

[commit-bot: I haz the power, 2014-02-15 01:59:23]

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

[commit-bot: I haz the power, 2014-02-15 01:59:24]

Retried try job too often on win_rel for step(s) telemetry_perf_unittests,
telemetry_unittests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_rel&nu...

[danakj, 2014-02-18 22:07:00]

The CQ bit was checked by danakj@chromium.org

[commit-bot: I haz the power, 2014-02-18 22:08:46]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/danakj@chromium.org/167973003/1

[commit-bot: I haz the power, 2014-02-19 00:28:38]

Change committed as 251896