Replace use of GrTHashTable in GrFontCache with SkTDynamicHash.

include/gpu/GrGlyph.h

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGlyph_DEFINED
 #define GrGlyph_DEFINED
 
 #include "GrRect.h"
 #include "SkPath.h"
+#include "SkChecksum.h"
 
 class GrPlot;
 
 /*  Need this to be quad-state:
     - complete w/ image
     - just metrics
     - failed to get image, but has metrics
     - failed to get metrics
  */
 struct GrGlyph {
@@ skipping 42 matching lines @@
         return ((packed >> 18) & 3) << 14;
     }
 
     static inline SkFixed UnpackFixedY(PackedID packed) {
         return ((packed >> 16) & 3) << 14;
     }
 
     static inline uint16_t UnpackID(PackedID packed) {
         return (uint16_t)packed;
     }
+
+    static inline const GrGlyph::PackedID& GetKey(const GrGlyph& glyph) {
+        return glyph.fPackedID;
+    }
+
+    static inline uint32_t Hash(GrGlyph::PackedID key) {
+        return SkChecksum::Murmur3(&key, sizeof(key));
+    }
 };
 
-
 #endif