Use sse4.2 CRC32 instructions to hash when available.

src/gpu/batches/GrAADistanceFieldPathRenderer.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrAADistanceFieldPathRenderer_DEFINED
 #define GrAADistanceFieldPathRenderer_DEFINED
 
 #include "GrBatchAtlas.h"
 #include "GrPathRenderer.h"
 #include "GrRect.h"
 #include "GrShape.h"
 
-#include "SkChecksum.h"
+#include "SkOpts.h"
 #include "SkTDynamicHash.h"
 
 class GrContext;
 
 class GrAADistanceFieldPathRenderer : public GrPathRenderer {
 public:
     GrAADistanceFieldPathRenderer();
     virtual ~GrAADistanceFieldPathRenderer();
 
 private:
@@ skipping 47 matching lines @@
         GrBatchAtlas::AtlasID fID;
         SkRect                fBounds;
         SkIPoint16            fAtlasLocation;
         SK_DECLARE_INTERNAL_LLIST_INTERFACE(ShapeData);
 
         static inline const Key& GetKey(const ShapeData& data) {
             return data.fKey;
         }
 
         static inline uint32_t Hash(Key key) {
-            return SkChecksum::Murmur3(key.data(), sizeof(uint32_t) * key.count32());
+            return SkOpts::hash(key.data(), sizeof(uint32_t) * key.count32());
         }
     };
 
     static void HandleEviction(GrBatchAtlas::AtlasID, void*);
 
     typedef SkTDynamicHash<ShapeData, ShapeData::Key> ShapeCache;
     typedef SkTInternalLList<ShapeData> ShapeDataList;
 
     GrBatchAtlas*                      fAtlas;
     ShapeCache                         fShapeCache;
     ShapeDataList                      fShapeList;
 
     typedef GrPathRenderer INHERITED;
 
     friend class AADistanceFieldPathBatch;
     friend struct PathTestStruct;
 };
 
 #endif