Make GrResourceCache2 responsible for calling release, abandon, and ~.

src/gpu/GrGpuResourceCacheAccess.h

Index: src/gpu/GrGpuResourceCacheAccess.h
diff --git a/src/gpu/GrGpuResourceCacheAccess.h b/src/gpu/GrGpuResourceCacheAccess.h
index 7417a55a718bcadfefac8a6a084431ace8c9f98e..3c3786d05359086954c0e23c6cc478b58987c208 100644
--- a/src/gpu/GrGpuResourceCacheAccess.h
+++ b/src/gpu/GrGpuResourceCacheAccess.h
@@ -54,6 +54,26 @@ public:
         return NULL;
     }
 
+    /**
+     * Called by the cache to delete the resource under normal circumstances.
+     */
+    void release() {
+        fResource->release();
+        if (fResource->isPurgable()) {            
+            SkDELETE(fResource);
+        }
+    }
+
+    /**
+     * Called by the cache to delete the resource when the backend 3D context is no longer valid.
+     */
+    void abandon() {
+        fResource->abandon();
+        if (fResource->isPurgable()) {            
+            SkDELETE(fResource);
+        }
+    }
+
 private:
     CacheAccess(GrGpuResource* resource) : fResource(resource) { }
     CacheAccess(const CacheAccess& that) : fResource(that.fResource) { }