am b582af31: am 0bc12a0b: Merge "Added Caching for PreProcessed PNGs"

* commit 'b582af31c74a58922120fdb747c1a3b867d95e90':
  Added Caching for PreProcessed PNGs
diff --git a/include/utils/RefBase.h b/include/utils/RefBase.h
index d92cfb0..0af7e6a 100644
--- a/include/utils/RefBase.h
+++ b/include/utils/RefBase.h
@@ -115,6 +115,7 @@
     // used to override the RefBase destruction.
     class Destroyer {
         friend class RefBase;
+        friend class weakref_type;
     public:
         virtual ~Destroyer();
     private: