Use Refcounted to manage to NativeEntry (bug 5852 part 4, r=ds).

--HG--
extra : rebase_source : 2e08816db6819c9d9957a0e0ade9cd1aa420fd54

public/amtl/am-refcounting.h

@@ -1,4 +1,4 @@
-// vim: set sts=8 ts=2 sw=2 tw=99 et:
+// vim: set sts=8 ts=4 sw=4 tw=99 et:
 //
 // Copyright (C) 2013, David Anderson and AlliedModders LLC
 // All rights reserved.
@@ -31,6 +31,7 @@
 #define _include_amtl_refcounting_h_
 
 #include <am-utility.h>
+#include <am-moveable.h>
 
 namespace ke {
 
@@ -189,6 +190,11 @@ class Ref
     {
         AddRef();
     }
+    Ref(Moveable<Ref> other)
+      : thing_(other->thing_)
+    {
+        other->thing_ = NULL;
+    }
     template <typename S>
     Ref(const Ref<S> &other)
       : thing_(*other)
@@ -255,6 +261,13 @@ class Ref
         return *this;
     }
 
+    Ref &operator =(Moveable<Ref> other) {
+        Release();
+        thing_ = other->thing_;
+        other->thing_ = NULL;
+        return *this;
+    }
+
   private:
     void AddRef() {
         if (thing_)