diff -r 000000000000 -r 6474c204b198 dom/interfaces/events/nsIDOMCloseEvent.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/interfaces/events/nsIDOMCloseEvent.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,28 @@
+/* -*- 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/. */
+
+#include "nsIDOMEvent.idl"
+
+/**
+ * The CloseEvent interface is the interface to the event
+ * close on a WebSocket object.
+ *
+ * For more information on this interface, please see
+ * http://dev.w3.org/html5/websockets/#closeevent
+ */
+[scriptable, builtinclass, uuid(0b85dc61-2436-4786-b153-097f5c3a33b6)]
+interface nsIDOMCloseEvent : nsIDOMEvent
+{
+  readonly attribute boolean wasClean;
+  readonly attribute unsigned short code;
+  readonly attribute DOMString reason;
+
+  void initCloseEvent(in DOMString aType,
+                      in boolean aCanBubble,
+                      in boolean aCancelable,
+                      in boolean aWasClean,
+                      in unsigned short aReasonCode,
+                      in DOMString aReason);
+};