Use sse4.2 CRC32 instructions to hash when available.

src/gpu/text/GrAtlasTextBlob.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 GrAtlasTextBlob_DEFINED
 #define GrAtlasTextBlob_DEFINED
 
 #include "GrBatchAtlas.h"
 #include "GrBatchFontCache.h"
 #include "GrColor.h"
 #include "GrMemoryPool.h"
 #include "SkDescriptor.h"
 #include "SkMaskFilter.h"
+#include "SkOpts.h"
 #include "SkPathEffect.h"
 #include "SkRasterizer.h"
 #include "SkSurfaceProps.h"
 #include "SkTInternalLList.h"
 
 class GrBlobRegenHelper;
 struct GrDistanceFieldAdjustTable;
 class GrMemoryPool;
 class SkDrawFilter;
 class SkTextBlob;
@@ skipping 55 matching lines @@
             fStrokeInfo.fMiterLimit = paint.getStrokeMiter();
             fStrokeInfo.fJoin = paint.getStrokeJoin();
         }
     }
 
     static const Key& GetKey(const GrAtlasTextBlob& blob) {
         return blob.fKey;
     }
 
     static uint32_t Hash(const Key& key) {
-        return SkChecksum::Murmur3(&key, sizeof(Key));
+        return SkOpts::hash(&key, sizeof(Key));
     }
 
     void operator delete(void* p) {
         GrAtlasTextBlob* blob = reinterpret_cast<GrAtlasTextBlob*>(p);
         blob->fPool->release(p);
     }
     void* operator new(size_t) {
         SkFAIL("All blobs are created by placement new.");
         return sk_malloc_throw(0);
     }
@@ skipping 454 matching lines @@
     // We can reuse distance field text, but only if the new viewmatrix would not result in
     // a mip change.  Because there can be multiple runs in a blob, we track the overall
     // maximum minimum scale, and minimum maximum scale, we can support before we need to regen
     SkScalar fMaxMinScale;
     SkScalar fMinMaxScale;
     int fRunCount;
     uint8_t fTextType;
 };
 
 #endif