Use TestBrowserThreadBundle in MediaGalleriesPreferences tests.

Use TestBrowserThreadBundle in MediaGalleriesPreferences tests.

Simplify code and potentially plug a memory leak.

BUG=270940
R=thestig@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=216926

[earthdok, 2013-08-09 20:12:29]

ptal

[Lei Zhang, 2013-08-09 21:32:02]

lgtm

https://codereview.chromium.org/22625008/diff/1/chrome/browser/media_gallerie...
File chrome/browser/media_galleries/media_galleries_preferences_unittest.cc
(right):

https://codereview.chromium.org/22625008/diff/1/chrome/browser/media_gallerie...
chrome/browser/media_galleries/media_galleries_preferences_unittest.cc:12:
#include "base/message_loop/message_loop.h"
No longer used -> remove?

[commit-bot: I haz the power, 2013-08-09 22:06:20]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/earthdok@chromium.org/22625008/2

[commit-bot: I haz the power, 2013-08-09 22:41:45]

Step "update" is always a major failure.
Look at the try server FAQ for more details.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win&number...

[commit-bot: I haz the power, 2013-08-10 10:05:25]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/earthdok@chromium.org/22625008/2

[commit-bot: I haz the power, 2013-08-10 14:04:45]

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

[commit-bot: I haz the power, 2013-08-10 17:37:46]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/earthdok@chromium.org/22625008/2

[commit-bot: I haz the power, 2013-08-12 05:11:14]

Change committed as 216926