SkDiscardableMemory::Factory class

include/core/SkDiscardableMemory.h

Index: include/core/SkDiscardableMemory.h
diff --git a/src/core/SkDiscardableMemory.h b/include/core/SkDiscardableMemory.h
similarity index 79%
rename from src/core/SkDiscardableMemory.h
rename to include/core/SkDiscardableMemory.h
index e1634eef4f4013a5945f4cb64f67b09c17d16271..f3159fe2af0c46261814b84a65d4ac020216c7b3 100644
--- a/src/core/SkDiscardableMemory.h
+++ b/include/core/SkDiscardableMemory.h
@@ -8,6 +8,7 @@
 #ifndef SkDiscardableMemory_DEFINED
 #define SkDiscardableMemory_DEFINED
 
+#include "SkRefCnt.h"
 #include "SkTypes.h"
 
 /**
@@ -15,7 +16,6 @@
  *  embedder.
  */
 class SK_API SkDiscardableMemory {
-
 public:
     /**
      *  Factory method that creates, initializes and locks an SkDiscardableMemory
@@ -23,6 +23,17 @@ public:
      */
     static SkDiscardableMemory* Create(size_t bytes);
 
+    /**
+     *  Factory class that creates, initializes and locks an SkDiscardableMemory
+     *  object. If either of these steps fails, a NULL pointer will be returned.
+     */
+    class Factory : public SkRefCnt {
+    public:
+        virtual SkDiscardableMemory* create(size_t bytes) = 0;
+    private:
+        typedef SkRefCnt INHERITED;
+    };
+
     /** Must not be called while locked.
      */
     virtual ~SkDiscardableMemory() {}