diff -r 000000000000 -r 6474c204b198 dom/webidl/PeerConnectionObserver.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/PeerConnectionObserver.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,49 @@
+/* -*- 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/.
+ */
+
+interface nsISupports;
+
+[ChromeOnly,
+ JSImplementation="@mozilla.org/dom/peerconnectionobserver;1",
+ Constructor (mozRTCPeerConnection domPC)]
+interface PeerConnectionObserver
+{
+  /* JSEP callbacks */
+  void onCreateOfferSuccess(DOMString offer);
+  void onCreateOfferError(unsigned long name, DOMString message);
+  void onCreateAnswerSuccess(DOMString answer);
+  void onCreateAnswerError(unsigned long name, DOMString message);
+  void onSetLocalDescriptionSuccess();
+  void onSetRemoteDescriptionSuccess();
+  void onSetLocalDescriptionError(unsigned long name, DOMString message);
+  void onSetRemoteDescriptionError(unsigned long name, DOMString message);
+  void onAddIceCandidateSuccess();
+  void onAddIceCandidateError(unsigned long name, DOMString message);
+  void onIceCandidate(unsigned short level, DOMString mid, DOMString candidate);
+
+  /* Stats callbacks */
+  void onGetStatsSuccess(optional RTCStatsReportInternal report);
+  void onGetStatsError(unsigned long name, DOMString message);
+
+  /* Data channel callbacks */
+  void notifyDataChannel(DataChannel channel);
+  void notifyConnection();
+  void notifyClosedConnection();
+
+  /* Notification of one of several types of state changed */
+  void onStateChange(PCObserverStateType state);
+
+  /* Changes to MediaStreams */
+  void onAddStream(MediaStream stream);
+  void onRemoveStream();
+  void onAddTrack();
+  void onRemoveTrack();
+
+  /* Helper function to access supported constraints defined in webidl. Needs to
+   * be in a separate webidl object we hold, so putting it here was convenient.
+   */
+  MediaConstraintSet getSupportedConstraints(optional MediaConstraintSet constraints);
+};