Remove unnecessary includes.

src/effects/SkColorMatrix.cpp

-
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkColorMatrix.h"
-#include "SkReadBuffer.h"
-#include "SkWriteBuffer.h"
 
 void SkColorMatrix::setIdentity() {
     memset(fMat, 0, sizeof(fMat));
     fMat[kR_Scale] = fMat[kG_Scale] = fMat[kB_Scale] = fMat[kA_Scale] = 1;
 }
 
 void SkColorMatrix::setScale(SkScalar rScale, SkScalar gScale, SkScalar bScale,
                              SkScalar aScale) {
     memset(fMat, 0, sizeof(fMat));
     fMat[kR_Scale] = rScale;
@@ skipping 135 matching lines @@
 static const SkScalar kU2B = 1.772f;
 
 void SkColorMatrix::setYUV2RGB() {
     memset(fMat, 0, sizeof(fMat));
 
     setrow(fMat +  0, 1, 0, kV2R);
     setrow(fMat +  5, 1, kU2G, kV2G);
     setrow(fMat + 10, 1, kU2B, 0);
     fMat[kA_Scale] = 1;
 }