diff -r 000000000000 -r 6474c204b198 dom/webidl/MediaStream.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/MediaStream.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,35 @@
+/* -*- 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 origins of this IDL file are
+ * http://dev.w3.org/2011/webrtc/editor/getusermedia.html
+ *
+ * Copyright � 2012 W3C� (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+// These dictionaries need to be in a separate file from their
+// MediaTrackConstraints* counterparts due to a webidl compiler limitation.
+
+dictionary MediaStreamConstraints {
+    (boolean or MediaTrackConstraints) audio = false;
+    (boolean or MediaTrackConstraints) video = false;
+    boolean picture = false; // Mozilla legacy
+    boolean fake = false;    // for testing
+};
+
+interface MediaStream {
+    // readonly attribute DOMString    id;
+    sequence<AudioStreamTrack> getAudioTracks ();
+    sequence<VideoStreamTrack> getVideoTracks ();
+    // MediaStreamTrack           getTrackById (DOMString trackId);
+    // void                       addTrack (MediaStreamTrack track);
+    // void                       removeTrack (MediaStreamTrack track);
+    //         attribute boolean      ended;
+    //         attribute EventHandler onended;
+    //         attribute EventHandler onaddtrack;
+    //         attribute EventHandler onremovetrack;
+	readonly attribute double currentTime;
+};