diff -r 000000000000 -r 6474c204b198 dom/webidl/TelephonyCallGroup.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/TelephonyCallGroup.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,35 @@
+/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
+/* vim: set ts=2 et sw=2 tw=40: */
+/* 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/. */
+
+[Pref="dom.telephony.enabled"]
+interface TelephonyCallGroup : EventTarget {
+  readonly attribute CallsList calls;
+
+  [Throws]
+  void add(TelephonyCall call);
+
+  [Throws]
+  void add(TelephonyCall call, TelephonyCall secondCall);
+
+  [Throws]
+  void remove(TelephonyCall call);
+
+  [Throws]
+  void hold();
+
+  [Throws]
+  void resume();
+
+  readonly attribute DOMString state;
+
+  attribute EventHandler onstatechange;
+  attribute EventHandler onconnected;
+  attribute EventHandler onholding;
+  attribute EventHandler onheld;
+  attribute EventHandler onresuming;
+  attribute EventHandler oncallschanged;
+  attribute EventHandler onerror;
+};