Allow custom resources in the GrContext's cache

include/gpu/GrContext.h

Index: include/gpu/GrContext.h
diff --git a/include/gpu/GrContext.h b/include/gpu/GrContext.h
index 4d0a94e4cda92682d59c1d83a6f23bb08805857b..195ab72a7f377f71174ec7c092851e10077cad8a 100644
--- a/include/gpu/GrContext.h
+++ b/include/gpu/GrContext.h
@@ -899,6 +899,17 @@ public:
                     GrPathRendererChain::DrawType drawType = GrPathRendererChain::kColor_DrawType,
                     GrPathRendererChain::StencilSupport* stencilSupport = NULL);
 
+    /**
+     * Stores a custom resource in the cache, based on the specified key.
+     */
+    void addResourceToCache(const GrResourceKey&, GrCacheable*);
+
+    /**
+     * Finds a resource in the cache, based on the specified key. This is intended for use in
+     * conjunction with addResourceToCache(). The return value will be NULL if not found. The
+     * caller must balance with a call to unref().
+     */
+    GrCacheable* findAndRefCachedResource(const GrResourceKey&);
 
 #if GR_CACHE_STATS
     void printCacheStats() const;