Roll up patch for running layout tests under Aura.

Source/testing/runner/runner.gypi

 # Copyright (C) 2013 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 75 matching lines @@
       'WebPermissions.cpp',
       'WebPermissions.h',
       'WebPreferences.cpp',
       'WebTask.cpp',
       'WebTestInterfaces.cpp',
       'WebTestProxy.cpp',
       'WebTestThemeControlWin.cpp',
       'WebTestThemeControlWin.h',
       'WebTestThemeEngineMac.mm',
       'WebTestThemeEngineMac.h',
+      'WebTestThemeEngineMock.cpp',
+      'WebTestThemeEngineMock.h',
       'WebTestThemeEngineWin.cpp',
       'WebTestThemeEngineWin.h',
       'WebUserMediaClientMock.cpp',
       'WebUserMediaClientMock.h',
     ],
   }
 }