Notify resource caches when pixelref genID goes stale

src/core/SkBitmapCache.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkBitmapCache_DEFINED
 #define SkBitmapCache_DEFINED
 
 #include "SkScalar.h"
 #include "SkBitmap.h"
 
 class SkResourceCache;
 class SkMipMap;
 
+uint64_t SkMakeResourceCacheSharedIDForBitmap(uint32_t bitmapGenID);
+
+void SkNotifyBitmapGenIDIsStale(uint32_t bitmapGenID);
+
 class SkBitmapCache {
 public:
     /**
      * 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();
 
     /**
      *  Search based on the src bitmap and inverse scales in X and Y. If found, returns true and
@@ skipping 23 matching lines @@
                     SkResourceCache* localCache = NULL);
 };
 
 class SkMipMapCache {
 public:
     static const SkMipMap* FindAndRef(const SkBitmap& src, SkResourceCache* localCache = NULL);
     static const SkMipMap* AddAndRef(const SkBitmap& src, SkResourceCache* localCache = NULL);
 };
 
 #endif