diff -r 000000000000 -r 6474c204b198 dom/webidl/TestInterfaceJS.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/TestInterfaceJS.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+[JSImplementation="@mozilla.org/dom/test-interface-js;1",
+ Pref="dom.expose_test_interfaces",
+ Constructor(optional any anyArg, optional object objectArg)]
+interface TestInterfaceJS {
+  readonly attribute any anyArg;
+  readonly attribute object objectArg;
+  attribute any anyAttr;
+  attribute object objectAttr;
+  any pingPongAny(any arg);
+  object pingPongObject(any obj);
+
+  // For testing bug 968335.
+  DOMString getCallerPrincipal();
+};