Move OptionsUI browsertest away from listening for Signin notifications.

Move OptionsUI browsertest away from listening for Signin notifications.

This CL moves the OptionsUI browsertest from listening for Signin notifications
to observing the SigninManager as part of eliminating Signin notifications.

BUG=333997
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=260449

[Dan Beam, 2014-03-28 20:47:58]

lgtm

[blundell, 2014-03-28 20:50:19]

The CQ bit was checked by blundell@chromium.org

[commit-bot: I haz the power, 2014-03-28 20:55:09]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/blundell@chromium.org/217043003/1

[commit-bot: I haz the power, 2014-03-28 23:45:21]

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

[commit-bot: I haz the power, 2014-03-28 23:45:21]

Commit queue rejected this change because the description was changed
between the time the change entered the commit queue and the time it
was ready to commit. You can safely check the commit box again.

[blundell, 2014-03-29 07:24:48]

The CQ bit was checked by blundell@chromium.org

[commit-bot: I haz the power, 2014-03-29 07:24:56]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/blundell@chromium.org/217043003/1

[commit-bot: I haz the power, 2014-03-29 08:03:04]

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

[commit-bot: I haz the power, 2014-03-29 08:03:05]

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

[blundell, 2014-03-29 18:38:04]

The CQ bit was checked by blundell@chromium.org

[commit-bot: I haz the power, 2014-03-29 18:38:24]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/blundell@chromium.org/217043003/1

[commit-bot: I haz the power, 2014-03-30 17:30:58]

Change committed as 260449