Remove SkImageFilter::Set/GetExternalCache.

include/core/SkImageFilter.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkImageFilter_DEFINED
 #define SkImageFilter_DEFINED
 
@@ skipping 168 matching lines @@
     static void WrapTexture(GrTexture* texture, int width, int height, SkBitmap* result);
 
     /**
      * Recursively evaluate this filter on the GPU. If the filter has no GPU
      * implementation, it will be processed in software and uploaded to the GPU.
      */
     bool getInputResultGPU(SkImageFilter::Proxy* proxy, const SkBitmap& src, const Context&,
                            SkBitmap* result, SkIPoint* offset) const;
 #endif
 
-    /**
-     *  Set an external cache to be used for all image filter processing. This
-     *  will replace the default intra-frame cache.
-     */
-    static void SetExternalCache(Cache* cache);
-
-    /**
-     *  Returns the currently-set external cache, or NULL if none is set.
-     */
-    static Cache* GetExternalCache();
-
     SK_DEFINE_FLATTENABLE_TYPE(SkImageFilter)
 
 protected:
     class Common {
     public:
         Common() {}
         ~Common();
 
         /**
          *  Attempt to unflatten the cropRect and the expected number of input filters.
@@ skipping 125 matching lines @@
  */
 #define SK_IMAGEFILTER_UNFLATTEN_COMMON(localVar, expectedCount)    \
     Common localVar;                                                \
     do {                                                            \
         if (!localVar.unflatten(buffer, expectedCount)) {           \
             return NULL;                                            \
         }                                                           \
     } while (0)
 
 #endif