use murmur3 finisher to improve font hash efficiency

src/core/SkScalerContext.h

 /*
  * Copyright 2006 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 SkScalerContext_DEFINED
 #define SkScalerContext_DEFINED
 
@@ skipping 225 matching lines @@
      */
     static void   GetGammaLUTData(SkScalar contrast, SkScalar paintGamma, SkScalar deviceGamma,
                                   void* data);
 
     static void MakeRec(const SkPaint&, const SkDeviceProperties* deviceProperties,
                         const SkMatrix*, Rec* rec);
     static inline void PostMakeRec(const SkPaint&, Rec*);
 
     static SkMaskGamma::PreBlend GetMaskPreBlend(const Rec& rec);
 
+    const Rec& getRec() const { return fRec; }
+
 protected:
     Rec         fRec;
 
     /** Generates the contents of glyph.fAdvanceX and glyph.fAdvanceY.
      *  May call getMetrics if that would be just as fast.
      */
     virtual void generateAdvance(SkGlyph* glyph) = 0;
 
     /** Generates the contents of glyph.fWidth, fHeight, fTop, fLeft,
      *  as well as fAdvanceX and fAdvanceY if not already set.
@@ skipping 101 matching lines @@
     return static_cast<SkPaint::Hinting>(hint);
 }
 
 void SkScalerContextRec::setHinting(SkPaint::Hinting hinting) {
     fFlags = (fFlags & ~SkScalerContext::kHinting_Mask) |
                                 (hinting << SkScalerContext::kHinting_Shift);
 }
 
 
 #endif