Revert 227161 "Include angle tests in gpu_unittests"

Failing to build on win trybots even after clobbering.

> Include angle tests in gpu_unittests
> 
> BUG=
> TEST=gpu_unittests
> R=kbr@chromium.org, piman@chromium.org
> 
> Review URL: https://codereview.chromium.org/23509013

TBR=zmo@chromium.org

Review URL: https://codereview.chromium.org/26257004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227293 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227293