Fix memory leak in SkGradientShader.

src/effects/gradients/SkGradientShaderPriv.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkGradientShaderPriv_DEFINED
 #define SkGradientShaderPriv_DEFINED
 
@@ skipping 197 matching lines @@
 private:
     enum {
         kColorStorageCount = 4, // more than this many colors, and we'll use sk_malloc for the space
 
         kStorageSize = kColorStorageCount * (sizeof(SkColor) + sizeof(Rec))
     };
     SkColor     fStorage[(kStorageSize + 3) >> 2];
     SkColor*    fOrigColors; // original colors, before modulation by paint in context.
     bool        fColorsAreOpaque;
 
-    GradientShaderCache* getCache(U8CPU alpha) const;
+    GradientShaderCache* refCache(U8CPU alpha) const;
     mutable SkMutex                           fCacheMutex;
     mutable SkAutoTUnref<GradientShaderCache> fCache;
 
     void initCommon();
 
     typedef SkShader INHERITED;
 };
 
 static inline int init_dither_toggle(int x, int y) {
     x &= 1;
@@ skipping 194 matching lines @@
     GrGLUniformManager::UniformHandle fColorStartUni;
     GrGLUniformManager::UniformHandle fColorMidUni;
     GrGLUniformManager::UniformHandle fColorEndUni;
 
     typedef GrGLEffect INHERITED;
 };
 
 #endif
 
 #endif