Add two pixel-based compositor unittests.

ui/gfx/compositor/test/test_layer_animation_observer.h

Index: ui/gfx/compositor/test/test_layer_animation_observer.h
diff --git a/ui/gfx/compositor/test_layer_animation_observer.h b/ui/gfx/compositor/test/test_layer_animation_observer.h
similarity index 88%
rename from ui/gfx/compositor/test_layer_animation_observer.h
rename to ui/gfx/compositor/test/test_layer_animation_observer.h
index d0d6df35d545e5b1ac82a7ee1302ba44fb7703d0..8f7ca2d9e5db5c4a34d4784ae71bf1479f02e554 100644
--- a/ui/gfx/compositor/test_layer_animation_observer.h
+++ b/ui/gfx/compositor/test/test_layer_animation_observer.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef UI_GFX_COMPOSITOR_TEST_LAYER_ANIMATION_OBSERVER_
-#define UI_GFX_COMPOSITOR_TEST_LAYER_ANIMATION_OBSERVER_
+#ifndef UI_GFX_COMPOSITOR_TEST_TEST_LAYER_ANIMATION_OBSERVER_
+#define UI_GFX_COMPOSITOR_TEST_TEST_LAYER_ANIMATION_OBSERVER_
 #pragma once
 
 #include "base/compiler_specific.h"
@@ -52,4 +52,4 @@ class TestLayerAnimationObserver : public LayerAnimationObserver {
 
 }  // namespace ui
 
-#endif  // UI_GFX_COMPOSITOR_TEST_LAYER_ANIMATION_OBSERVER_
+#endif  // UI_GFX_COMPOSITOR_TEST_TEST_LAYER_ANIMATION_OBSERVER_