Revert 51362 - Un-flake and enable test.
Revert 51362 - Un-flake and enable test.

Ran tests for a few hours on windows without seeing a failure.

BUG=44026
TEST=BrowserAppRefocusTest.*

Review URL: http://codereview.chromium.org/2870036

TBR=skerner@chromium.org
Review URL: http://codereview.chromium.org/2865031

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@51365 0039d316-1c4b-4281-b951-d872f2087c98

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