Add abliity to set textblob cache budget to GrContext

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 119 matching lines @@
      *  Specify the GPU resource cache limits. If the current cache exceeds either
      *  of these, it will be purged (LRU) to keep the cache within these limits.
      *
      *  @param maxResources The maximum number of resources that can be held in
      *                      the cache.
      *  @param maxResourceBytes The maximum number of bytes of video memory
      *                          that can be held in the cache.
      */
     void setResourceCacheLimits(int maxResources, size_t maxResourceBytes);
 
+    /**
+     *  Specify the TextBlob cache limit. If the current cache exceeds this limit it will purge.
+     *
+     *  @param bytes The maximum number of bytes of cpu memory that can be held in the cache
+     */
+    void setTextBlobCacheLimit(size_t bytes);

[bsalomon, 2015/08/03 15:28:30]

Is this just needed for testing? Seems like an odd knob for our clients to use.

+
     GrTextureProvider* textureProvider() { return fTextureProvider; }
     const GrTextureProvider* textureProvider() const { return fTextureProvider; }
 
     /**
      * Frees GPU created by the context. Can be called to reduce GPU memory
      * pressure.
      */
     void freeGpuResources();
 
     /**
@@ skipping 308 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