Fix sky include guards to match Chromium style

sky/engine/wtf/DoubleBufferedDeque.h

 // Copyright 2014 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 DoubleBufferedDeque_h
-#define DoubleBufferedDeque_h
+#ifndef SKY_ENGINE_WTF_DOUBLEBUFFEREDDEQUE_H_
+#define SKY_ENGINE_WTF_DOUBLEBUFFEREDDEQUE_H_
 
 #include "sky/engine/wtf/Deque.h"
 #include "sky/engine/wtf/Noncopyable.h"
 
 namespace WTF {
 
 // A helper class for managing double buffered deques, typically where the client locks when appending or swapping.
 template <typename T> class DoubleBufferedDeque {
     WTF_MAKE_NONCOPYABLE(DoubleBufferedDeque);
 public:
@@ skipping 20 matching lines @@
 
 private:
     Deque<T> m_queue[2];
     int m_activeIndex;
 };
 
 } // namespace WTF
 
 using WTF::DoubleBufferedDeque;
 
-#endif // DoubleBufferedDeque_h
+#endif  // SKY_ENGINE_WTF_DOUBLEBUFFEREDDEQUE_H_