ozone: Make sure the platform doesn't get initialized more than once.

ozone: Make sure the platform doesn't get initialized more than once.

Trying to initialize the UI systems more than once can end up creating the
same subsystem (e.g. surface-factory) multiple times, which is not supported.
So remember whether the UI/GPU parts of the platform has been initialized.

BUG=361137
NOTRY=true
TBR=spang@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=270939

[sadrul, 2014-05-16 05:07:00]

Turns out we end up calling InitializeUI() on the same OzonePlatform instance
once for each test, causing crashes. This fixes the issue. I am going to land
this to green up the bot. Let me know if you have comments.

[sadrul, 2014-05-16 05:07:22]

The CQ bit was checked by sadrul@chromium.org

[sadrul, 2014-05-16 05:07:24]

The CQ bit was unchecked by sadrul@chromium.org

[sadrul, 2014-05-16 05:07:41]

The CQ bit was checked by sadrul@chromium.org

[commit-bot: I haz the power, 2014-05-16 05:07:56]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/sadrul@chromium.org/284253006/1

[sadrul, 2014-05-16 05:23:13]

The CQ bit was unchecked by sadrul@chromium.org

[sadrul, 2014-05-16 05:23:41]

Committed patchset #1 manually as r270939 (presubmit successful).

[commit-bot: I haz the power, 2014-05-16 05:24:08]

Failed to commit the patch.
Sending        ui/ozone/ozone_platform.cc
Transmitting file data .svn: Commit failed (details follow):
svn: File '/trunk/src/ui/ozone/ozone_platform.cc' is out of date

[spang, 2014-05-16 15:01:57]

lgtm