diff -r 000000000000 -r 6474c204b198 dom/webidl/Worker.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/Worker.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,31 @@
+/* -*- 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/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/multipage/workers.html
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and Opera
+ * Software ASA.
+ * You are granted a license to use, reproduce and create derivative works of
+ * this document.
+ */
+
+[Constructor(DOMString scriptURL),
+ Func="mozilla::dom::workers::WorkerPrivate::WorkerAvailable"]
+interface Worker : EventTarget {
+  void terminate();
+
+  [Throws]
+  void postMessage(any message, optional sequence<any> transfer);
+
+  attribute EventHandler onmessage;
+};
+
+Worker implements AbstractWorker;
+
+[Constructor(DOMString scriptURL),
+ Func="mozilla::dom::workers::ChromeWorkerPrivate::WorkerAvailable"]
+interface ChromeWorker : Worker {
+};