cc: Rename cc classes and members to match filenames

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
 
 #include "FloatPoint.h"
 #include "FloatPoint3D.h"
 
@@ skipping 19 matching lines @@
     bool shouldBeClipped() const
     {
         return w <= 0;
     }
 
     FloatPoint cartesianPoint2d() const
     {
         if (w == 1)
             return FloatPoint(x, y);
 
-        // For now, because this code is used privately only by CCMathUtil, it should never be called when w == 0, and we do not yet need to handle that case.
+        // For now, because this code is used privately only by MathUtil, it should never be called when w == 0, and we do not yet need to handle that case.
         ASSERT(w);
         double invW = 1.0 / w;
         return FloatPoint(x * invW, y * invW);
     }
 
     FloatPoint3D cartesianPoint3d() const
     {
         if (w == 1)
             return FloatPoint3D(x, y, z);
 
-        // For now, because this code is used privately only by CCMathUtil, it should never be called when w == 0, and we do not yet need to handle that case.
+        // For now, because this code is used privately only by MathUtil, it should never be called when w == 0, and we do not yet need to handle that case.
         ASSERT(w);
         double invW = 1.0 / w;
         return FloatPoint3D(x * invW, y * invW, z * invW);
     }
 
     double x;
     double y;
     double z;
     double w;
 };
 
-class CCMathUtil {
+class MathUtil {
 public:
 
     // Background: WebTransformationMatrix code in WebCore does not do the right thing in
     // mapRect / mapQuad / projectQuad when there is a perspective projection that causes
     // one of the transformed vertices to go to w < 0. In those cases, it is necessary to
     // perform clipping in homogeneous coordinates, after applying the transform, before
     // dividing-by-w to convert to cartesian coordinates.
     //
     // These functions return the axis-aligned rect that encloses the correctly clipped,
     // transformed polygon.
@@ skipping 24 matching lines @@
     // 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