Add two pixel-based compositor unittests.

ui/gfx/compositor/test/test_suite.h

Index: ui/gfx/compositor/test/test_suite.h
diff --git a/ui/gfx/compositor/test_suite.h b/ui/gfx/compositor/test/test_suite.h
similarity index 83%
rename from ui/gfx/compositor/test_suite.h
rename to ui/gfx/compositor/test/test_suite.h
index 55662825abff98f2e33b882b1fc612960709712d..ef3fc19b58db2f9450399b23f7c1cf60915af896 100644
--- a/ui/gfx/compositor/test_suite.h
+++ b/ui/gfx/compositor/test/test_suite.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_SUITE_H_
-#define UI_GFX_COMPOSITOR_TEST_SUITE_H_
+#ifndef UI_GFX_COMPOSITOR_TEST_TEST_SUITE_H_
+#define UI_GFX_COMPOSITOR_TEST_TEST_SUITE_H_
 #pragma once
 
 #include "base/compiler_specific.h"
@@ -30,4 +30,4 @@ class CompositorTestSuite : public base::TestSuite {
   scoped_ptr<MessageLoop> message_loop_;
 };
 
-#endif  // UI_GFX_COMPOSITOR_TEST_SUITE_H_
+#endif  // UI_GFX_COMPOSITOR_TEST_TEST_SUITE_H_