Use a mocked compositor for unit tests

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
diff --git a/chrome/chrome_tests.gypi b/chrome/chrome_tests.gypi
index 33746094827affc43e47747de82e79359a9e53d0..a00e10ca4edc01c613c3bd3e938c7e89b0b64427 100644
--- a/chrome/chrome_tests.gypi
+++ b/chrome/chrome_tests.gypi
@@ -231,6 +231,12 @@
         '../content/common/notification_observer_mock.h',
         '../ui/gfx/image/image_unittest_util.h',
         '../ui/gfx/image/image_unittest_util.cc',
+        '../ui/gfx/compositor/compositor.cc',
+        '../ui/gfx/compositor/compositor.h',
+        '../ui/gfx/compositor/test_compositor.cc',
+        '../ui/gfx/compositor/test_compositor.h',
+        '../ui/gfx/compositor/test_texture.cc',
+        '../ui/gfx/compositor/test_texture.h',
         '../webkit/quota/mock_quota_manager.cc',
         '../webkit/quota/mock_quota_manager.h',
       ],
@@ -240,6 +246,16 @@
             ['exclude', '^browser/chromeos'],
           ],
         }],
+        ['views_compositor!=1', {
+          'sources!': [
+            '../ui/gfx/compositor/compositor.cc',
+            '../ui/gfx/compositor/compositor.h',
+            '../ui/gfx/compositor/test_compositor.cc',
+            '../ui/gfx/compositor/test_compositor.h',
+            '../ui/gfx/compositor/test_texture.cc',
+            '../ui/gfx/compositor/test_texture.h',
+          ],
+        }],
         ['toolkit_uses_gtk == 1', {
           'dependencies': [
             '../build/linux/system.gyp:gtk',