Add color correction benchmark - with comparison to qcms

include/codec/SkCodec.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkCodec_DEFINED
 #define SkCodec_DEFINED
 
 #include "../private/SkTemplates.h"
 #include "SkColor.h"
 #include "SkEncodedFormat.h"
 #include "SkEncodedInfo.h"
 #include "SkImageInfo.h"
 #include "SkSize.h"
 #include "SkStream.h"
 #include "SkTypes.h"
 #include "SkYUVSizeInfo.h"
 
 class SkColorSpace;
 class SkData;
 class SkPngChunkReader;
 class SkSampler;
 
 namespace DM {
 class CodecSrc;
 class ColorCodecSrc;
 }
+class ColorCodecBench;
 
 /**
  *  Abstraction layer directly on top of an image codec.
  */
 class SkCodec : SkNoncopyable {
 public:
     /**
      *  Minimum number of bytes that must be buffered in SkStream input.
      *
      *  An SkStream passed to NewFromStream must be able to use this many
@@ skipping 729 matching lines @@
      *  Return an object which will allow forcing scanline decodes to sample in X.
      *
      *  May create a sampler, if one is not currently being used. Otherwise, does
      *  not affect ownership.
      *
      *  Only valid during scanline decoding.
      */
     virtual SkSampler* getSampler(bool /*createIfNecessary*/) { return nullptr; }
 
     // For testing with qcms
-    // FIXME: Remove this when we are done comparing with qcms.
+    // FIXME: Remove these when we are done comparing with qcms.
     friend class DM::ColorCodecSrc;
+    friend class ColorCodecBench;
+
     friend class DM::CodecSrc;  // for fillIncompleteImage
     friend class SkSampledCodec;
     friend class SkIcoCodec;
 };
 #endif // SkCodec_DEFINED