Expose RTCDataChannel and RTCDataChannelEvent (with constructor)

third_party/WebKit/Source/modules/peerconnection/RTCDataChannel.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
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 19 matching lines @@
     "open",
     "closing",
     "closed"
 };
 
 // https://w3c.github.io/webrtc-pc/#rtcdatachannel
 
 [
     ActiveScriptWrappable,
     DependentLifetime,
-    NoInterfaceObject,
 ] interface RTCDataChannel : EventTarget {
     readonly attribute USVString label;
     readonly attribute boolean ordered;
     // TODO(foolip): |maxRetransmitTime| is called |maxPacketLifeTime| in the
     // spec and both it and |maxRetransmits| are nullable.
     [Measure] readonly attribute unsigned short maxRetransmitTime;
     [Measure] readonly attribute unsigned short maxRetransmits;
     readonly attribute USVString protocol;
     readonly attribute boolean negotiated;
     readonly attribute unsigned short id;
     readonly attribute RTCDataChannelState readyState;
     readonly attribute unsigned long bufferedAmount;
              attribute unsigned long bufferedAmountLowThreshold;
              attribute EventHandler onopen;
              attribute EventHandler onbufferedamountlow;
              attribute EventHandler onerror;
              attribute EventHandler onclose;
     void close();
              attribute EventHandler onmessage;
     [RaisesException=Setter] attribute DOMString binaryType;
     // TODO(foolip): |data| should be USVString.
     [RaisesException] void send(DOMString data);
     [RaisesException] void send(Blob data);
     [RaisesException] void send(ArrayBuffer data);
     [RaisesException] void send(ArrayBufferView data);
 
     // Non-standard APIs
     [Measure] readonly attribute boolean reliable;
 };