Used use-gl=any instead of forcing osmesa for UI tests.

chrome/test/ui/ui_test.h

Index: chrome/test/ui/ui_test.h
===================================================================
--- chrome/test/ui/ui_test.h	(revision 107998)
+++ chrome/test/ui/ui_test.h	(working copy)
@@ -356,12 +356,6 @@
   // PID file for websocket server.
   FilePath websocket_pid_file_;
 
-  // Whether to force use of mesa for GL rendering.
-  bool force_use_osmesa_;
-
-  // Whether to disable accelerated compositing for this test.
-  bool disable_accelerated_compositing_;
-
  private:
   // Time the test was started (so we can check for new crash dumps)
   base::Time test_start_time_;