This will cause build failed since a include file does not exist.

This will cause build failed since a include file does not exist.

"chrome/test/base/ui_test_utils.h", which is included by this CL, has created after M14 was branched.

Revert 95776 - Merge 95567 - WebUI TaskManager: make it default on Chrome OS

And fixes the code of task manager and following tests which didn't work correctly on WebUI TaskManager.
- TaskManagerBrowserTest.ShutdownWhileOpen
- ExtensionApiTest.ProcessesVsTaskManager
- PrerenderBrowserTest.PrerenderTaskManager

BUG=chromium-os:13885
TEST=trybots

Review URL: http://codereview.chromium.org/7550004

TBR=yoshiki@chromium.org
Review URL: http://codereview.chromium.org/7541070

TBR=yoshiki@chromium.org
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=95778