Remove separate cache for clip mask textures

include/gpu/GrContext.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 GrContext_DEFINED
 #define GrContext_DEFINED
 
@@ skipping 412 matching lines @@
             sk_bzero(fDrawContext, sizeof(fDrawContext));
         }
 
         ~DrawingMgr();
 
         void init(GrContext* context);
 
         void abandon();
         bool abandoned() const { return NULL == fDrawTarget; }
 
-        void purgeResources();
         void reset();
         void flush();
 
         // Callers should take a ref if they rely on the GrDrawContext sticking around.
         // NULL will be returned if the context has been abandoned.
         GrDrawContext* drawContext(const SkSurfaceProps* surfaceProps);
 
     private:
         void cleanup();
 
@@ skipping 39 matching lines @@
     /**
      * A callback similar to the above for use by the TextBlobCache
      * TODO move textblob draw calls below context so we can use the call above.
      */
     static void TextBlobCacheOverBudgetCB(void* data);
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif