Use sse4.2 CRC32 instructions to hash when available.

src/pdf/SkPDFGraphicState.h

 /*
  * Copyright 2010 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkPDFGraphicState_DEFINED
 #define SkPDFGraphicState_DEFINED
 
 #include "SkPDFTypes.h"
-#include "SkChecksum.h"
+#include "SkOpts.h"
 
 class SkPaint;
 class SkPDFCanon;
 
 /** \class SkPDFGraphicState
     SkPaint objects roughly correspond to graphic state dictionaries that can
     be installed. So that a given dictionary is only output to the pdf file
     once, we want to canonicalize them.
 */
 class SkPDFGraphicState final : public SkPDFObject {
@@ skipping 32 matching lines @@
                                                  SkPDFSMaskMode sMaskMode,
                                                  SkPDFCanon* canon);
 
     /** Make a graphic state that only unsets the soft mask. */
     static sk_sp<SkPDFDict> MakeNoSmaskGraphicState();
     static sk_sp<SkPDFStream> MakeInvertFunction();
 
     bool operator==(const SkPDFGraphicState& rhs) const {
         return 0 == memcmp(&fStrokeWidth, &rhs.fStrokeWidth, 12);
     }
-    uint32_t hash() const { return SkChecksum::Murmur3(&fStrokeWidth, 12); }
+    uint32_t hash() const { return SkOpts::hash(&fStrokeWidth, 12); }
 
 private:
     const SkScalar fStrokeWidth;
     const SkScalar fStrokeMiter;
     const uint8_t fAlpha;
     const uint8_t fStrokeCap;   // SkPaint::Cap
     const uint8_t fStrokeJoin;  // SkPaint::Join
     const uint8_t fMode;        // SkXfermode::Mode
 
     SkPDFGraphicState(const SkPaint&);
 
     typedef SkPDFDict INHERITED;
 };
 
 #endif