RTCPeerConnection.ontrack event added.

third_party/WebKit/Source/modules/peerconnection/RTCPeerConnection.idl

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 103 matching lines @@
 
     // RTP Media API
     // https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnection-getsenders
     [RuntimeEnabled=RTCRtpSender] sequence<RTCRtpSender> getSenders();
     // https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnection-getreceivers
     sequence<RTCRtpReceiver> getReceivers();
     // https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnection-addtrack
     [RuntimeEnabled=RTCRtpSender, RaisesException] RTCRtpSender addTrack(MediaStreamTrack track, MediaStream... streams);
     // https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnection-removetrack
     [RuntimeEnabled=RTCRtpSender, RaisesException] void removeTrack(RTCRtpSender sender);
+    // https://w3c.github.io/webrtc-pc/#dom-rtcpeerconnection-ontrack
+    attribute EventHandler ontrack;
 
     // https://w3c.github.io/webrtc-pc/#peer-to-peer-data-api
     [CallWith=ScriptState, RaisesException] RTCDataChannel createDataChannel(USVString label, optional RTCDataChannelInit dataChannelDict);
     attribute EventHandler ondatachannel;
 
     // Certificate management
     // https://w3c.github.io/webrtc-pc/#sec.cert-mgmt
     [RaisesException, CallWith=ScriptState] static Promise<RTCCertificate> generateCertificate(AlgorithmIdentifier keygenAlgorithm);
 
     // Non-standard or removed from the spec:
     [Measure] sequence<MediaStream> getLocalStreams();
     [Measure] sequence<MediaStream> getRemoteStreams();
     [DeprecateAs=V8RTCPeerConnection_GetStreamById_Method] MediaStream getStreamById(DOMString streamId);
     [Measure, CallWith=ScriptState, RaisesException] void addStream(MediaStream? stream, optional Dictionary mediaConstraints);
     [Measure, RaisesException] void removeStream(MediaStream? stream);
     [Measure, RaisesException] RTCDTMFSender createDTMFSender(MediaStreamTrack track);
     attribute EventHandler onaddstream;
     attribute EventHandler onremovestream;
 };