diff -r 000000000000 -r 6474c204b198 dom/webidl/RTCSessionDescription.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/RTCSessionDescription.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,29 @@
+/* -*- 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://dev.w3.org/2011/webrtc/editor/webrtc.html#idl-def-RTCSessionDescription
+ */
+
+enum RTCSdpType {
+  "offer",
+  "pranswer",
+  "answer"
+};
+
+dictionary RTCSessionDescriptionInit {
+  RTCSdpType? type = null;
+  DOMString? sdp = null;
+};
+
+[Pref="media.peerconnection.enabled",
+ JSImplementation="@mozilla.org/dom/rtcsessiondescription;1",
+ Constructor(optional RTCSessionDescriptionInit descriptionInitDict)]
+interface mozRTCSessionDescription {
+  attribute RTCSdpType? type;
+  attribute DOMString? sdp;
+
+  jsonifier;
+};