Add two pixel-based compositor unittests.

ui/gfx/compositor/compositor.gyp

Index: ui/gfx/compositor/compositor.gyp
diff --git a/ui/gfx/compositor/compositor.gyp b/ui/gfx/compositor/compositor.gyp
index db00d380d75f15f93af0178a4f7cc6eeacde1e3f..0b1bc5b95bccd261e48a7eba80494845063a9804 100644
--- a/ui/gfx/compositor/compositor.gyp
+++ b/ui/gfx/compositor/compositor.gyp
@@ -114,8 +114,8 @@
         '<(DEPTH)/base/base.gyp:base',
       ],
       'sources': [
-        'compositor_test_support.cc',
-        'compositor_test_support.h',
+        'test/compositor_test_support.cc',
+        'test/compositor_test_support.h',
       ],
       'conditions': [
         ['use_webkit_compositor == 1', {
@@ -150,17 +150,17 @@
         'layer_animator_unittest.cc',
         'layer_unittest.cc',
         'run_all_unittests.cc',
-        'test_compositor_host.h',
-        'test_compositor_host_linux.cc',
-        'test_compositor_host_win.cc',
-        'test_layer_animation_delegate.cc',
-        'test_layer_animation_delegate.h',
-        'test_layer_animation_observer.cc',
-        'test_layer_animation_observer.h',
-        'test_suite.cc',
-        'test_suite.h',
-        'test_utils.cc',
-        'test_utils.h',
+        'test/test_compositor_host.h',
+        'test/test_compositor_host_linux.cc',
+        'test/test_compositor_host_win.cc',
+        'test/test_layer_animation_delegate.cc',
+        'test/test_layer_animation_delegate.h',
+        'test/test_layer_animation_observer.cc',
+        'test/test_layer_animation_observer.h',
+        'test/test_suite.cc',
+        'test/test_suite.h',
+        'test/test_utils.cc',
+        'test/test_utils.h',
         '<(SHARED_INTERMEDIATE_DIR)/ui/gfx/gfx_resources.rc',
         '<(SHARED_INTERMEDIATE_DIR)/ui/ui_resources/ui_resources.rc',
       ],
@@ -192,10 +192,10 @@
             'compositor',
           ],
           'sources': [
-            'test_compositor.cc',
-            'test_compositor.h',
-            'test_texture.cc',
-            'test_texture.h',
+            'test/test_compositor.cc',
+            'test/test_compositor.h',
+            'test/test_texture.cc',
+            'test/test_texture.h',
           ],
         }],
       ],