[cc] Change cc_tests.gyp filenames to Chromium style

cc/test/CCTestCommon.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CCTestCommon_h
-#define CCTestCommon_h
-
-#include "CCSettings.h"
-
-namespace WebKitTests {
-
-// If you have a test that modifies or uses global settings, keep an instance
-// of this class to ensure that you start and end with a clean slate.
-class CCScopedSettings {
-public:
-    CCScopedSettings() { cc::CCSettings::reset(); }
-    ~CCScopedSettings() { cc::CCSettings::reset(); }
-};
-
-} // namespace WebKitTests
-
-#endif // CCTestCommon_h
+// Temporary forwarding header
+#include "cc/test/test_common.h"