Bug 733636, part 2 - nsXPConnect::WrapNative should pass aAllowWrapping=true. r=bholley

js/xpconnect/src/nsXPConnect.cpp

@@ -548,7 +548,7 @@ nsXPConnect::WrapNative(JSContext * aJSContext,
     RootedObject aScope(aJSContext, aScopeArg);
     RootedValue v(aJSContext);
     return NativeInterface2JSObject(aScope, aCOMObj, nullptr, &aIID,
-                                    false, &v, aHolder);
+                                    true, &v, aHolder);
 }
 
 /* void wrapNativeToJSVal (in JSContextPtr aJSContext, in JSObjectPtr aScope, in nsISupports aCOMObj, in nsIIDPtr aIID, out jsval aVal, out nsIXPConnectJSObjectHolder aHolder); */