Add SkMaskCache

src/core/SkResourceCache.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkResourceCache_DEFINED
 #define SkResourceCache_DEFINED
 
@@ skipping 119 matching lines @@
      *  Returns the DiscardableFactory used by the global cache, or NULL.
      */
     static DiscardableFactory GetDiscardableFactory();
 
     /**
      * Use this allocator for bitmaps, so they can use ashmem when available.
      * Returns NULL if the ResourceCache has not been initialized with a DiscardableFactory.
      */
     static SkBitmap::Allocator* GetAllocator();
 
+    static SkCachedData* NewCachedData(size_t bytes);
+
     /**
      *  Call SkDebugf() with diagnostic information about the state of the cache
      */
     static void Dump();
 
     ///////////////////////////////////////////////////////////////////////////
 
     /**
      *  Construct the cache to call DiscardableFactory when it
      *  allocates memory for the pixels. In this mode, the cache has
@@ skipping 81 matching lines @@
 
     void init();    // called by constructors
 
 #ifdef SK_DEBUG
     void validate() const;
 #else
     void validate() const {}
 #endif
 };
 #endif