[cc] Change cc_tests.gyp filenames to Chromium style

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
+
+#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