cc: Fix header include guards of our header files.

cc/test/test_common.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
+#ifndef CC_TEST_TEST_COMMON_H_
+#define CC_TEST_TEST_COMMON_H_
 
 #include "cc/settings.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 ScopedSettings {
 public:
     ScopedSettings() { cc::Settings::resetForTest(); }
     ~ScopedSettings() { cc::Settings::resetForTest(); }
 };
 
 } // namespace WebKitTests
 
-#endif // CCTestCommon_h
+#endif  // CC_TEST_TEST_COMMON_H_