Bug 582100 - Only enumerate exposed properties. r=gal

--HG--
extra : rebase_source : 462b9167d01a699ae67effae1c1a710a8f7bece1

js/src/xpconnect/src/XPCChromeObjectWrapper.cpp

@@ -644,7 +644,23 @@ XPC_COW_Enumerate(JSContext *cx, JSObject *obj)
     return ThrowException(NS_ERROR_FAILURE, cx);
   }
 
-  return XPCWrapper::Enumerate(cx, obj, wrappedObj);
+  jsval exposedProps;
+  if (!JS_GetReservedSlot(cx, obj, sExposedPropsSlot, &exposedProps)) {
+    return JS_FALSE;
+  }
+
+  JSObject *propertyContainer;
+  if (JSVAL_IS_VOID(exposedProps)) {
+    // TODO For now, expose whatever properties are on our object.
+    propertyContainer = wrappedObj;
+  } else if (!JSVAL_IS_PRIMITIVE(exposedProps)) {
+    // Just expose whatever the object exposes through __exposedProps__.
+    propertyContainer = JSVAL_TO_OBJECT(exposedProps);
+  } else {
+    return JS_TRUE;
+  }
+
+  return XPCWrapper::Enumerate(cx, obj, propertyContainer);
 }
 
 static JSBool