Moves responsibility of invoking OnNativeWidgetCreated to DesktopRootWindowHost

Moves responsibility of invoking OnNativeWidgetCreated to DesktopRootWindowHost

I had centralized this in DesktopNativeWidgetAura, but it needs to be
in the DesktopRootWindowHost implementations as it may be invoked
during construction so that state can be set up. Otherwise we may
crash if during init state isn't set up.

I added test for coverage.

BUG=313780
TEST=covered by unit test
R=ben@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=233012

[Ben Goodger (Google), 2013-11-04 21:27:49]

lgtm

[commit-bot: I haz the power, 2013-11-04 21:36:13]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/sky@chromium.org/49303007/190001

[commit-bot: I haz the power, 2013-11-05 01:34:45]

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

[commit-bot: I haz the power, 2013-11-05 04:16:30]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/sky@chromium.org/49303007/190001

[commit-bot: I haz the power, 2013-11-05 06:58:29]

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

[sky, 2013-11-05 17:10:28]

Committed patchset #3 manually as r233012 (presubmit successful).