cc: Fix header include guards of our header files.

cc/math_util.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 CCMathUtil_h
-#define CCMathUtil_h
+#ifndef CC_MATH_UTIL_H_
+#define CC_MATH_UTIL_H_
 
 #include "base/logging.h"
 #include "cc/cc_export.h"
 #include "ui/gfx/point_f.h"
 #include "ui/gfx/point3_f.h"
 
 namespace WebKit {
 class WebTransformationMatrix;
 }
 
@@ skipping 88 matching lines @@
     // Returns the smallest angle between the given two vectors in degrees. Neither vector is
     // assumed to be normalized.
     static float smallestAngleBetweenVectors(const FloatSize&, const FloatSize&);
 
     // Projects the |source| vector onto |destination|. Neither vector is assumed to be normalized.
     static FloatSize projectVector(const FloatSize& source, const FloatSize& destination);
 };
 
 } // namespace cc
 
-#endif // #define CCMathUtil_h
+#endif  // CC_MATH_UTIL_H_