Expose RTCDataChannel and RTCDataChannelEvent (with constructor)

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

+// Copyright 2015 The Chromium Authors. All rights reserved.

[foolip, 2016/11/03 15:24:16]

off-by-one error :)

[lunalu1, 2016/11/08 20:27:35]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// https://w3c.github.io/webrtc-pc/#dom-rtcdatachannelevent

[foolip, 2016/11/03 15:24:16]

This is the definition of RTCDataChannelEvent constructor. This spec doesn't
have a section for this dictionary but
https://w3c.github.io/webrtc-pc/#rtcdatachannelevent or
https://w3c.github.io/webrtc-pc/#idl-def-rtcdatachanneleventinit is OK.

[lunalu1, 2016/11/08 20:27:35]

Done.

+
+// channel attribute needs to be required to avoid null instance of

[foolip, 2016/11/03 15:24:16]

Unlike most other specs on w3c.github.io, this one isn't automatically updated.
This was already fixed in https://github.com/w3c/webrtc-pc/pull/864 and will
eventually go live, so this comment won't be needed.

+// RTCDataChannelEvent created by new RTCDataChannelEvent('type', {}).
+
+dictionary RTCDataChannelEventInit : EventInit {
+    required RTCDataChannel channel;
+};