cc: Fix header include guards of our header files.

cc/thread.h

 // Copyright 2011 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 CCThread_h
-#define CCThread_h
+#ifndef CC_THREAD_H_
+#define CC_THREAD_H_
 
 #include "base/callback.h"
 #include "base/basictypes.h"
 #include "cc/cc_export.h"
 
 namespace cc {
 
 // Thread provides basic infrastructure for messaging with the compositor in a
 // platform-neutral way.
 class CC_EXPORT Thread {
 public:
     virtual ~Thread() { }
 
     // Executes the callback on context's thread asynchronously.
     virtual void postTask(base::Closure cb) = 0;
 
     // Executes the task after the specified delay.
     virtual void postDelayedTask(base::Closure cb, long long delayMs) = 0;
 
     virtual bool belongsToCurrentThread() const = 0;
 };
 
 }
 
-#endif
+#endif  // CC_THREAD_H_