Fix sky include guards to match Chromium style

sky/engine/wtf/RefVector.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 RefVector_h
-#define RefVector_h
+#ifndef SKY_ENGINE_WTF_REFVECTOR_H_
+#define SKY_ENGINE_WTF_REFVECTOR_H_
 
 #include "sky/engine/wtf/RefCounted.h"
 #include "sky/engine/wtf/RefPtr.h"
 #include "sky/engine/wtf/Vector.h"
 
 namespace blink {
 
 template <typename T>
 class RefVector : public RefCounted<RefVector<T> > {
 public:
@@ skipping 13 matching lines @@
     const Vector<T>& vector() const { return m_vector; }
 
 private:
     Vector<T> m_vector;
     RefVector() { }
     RefVector(const RefVector& o) : m_vector(o.m_vector) { }
 };
 
 } // namespace blink
 
-#endif // RefVector_h
+#endif  // SKY_ENGINE_WTF_REFVECTOR_H_