Fix RtcDataChannel for Firefox nightly

tools/dom/scripts/generator.py

 #!/usr/bin/python
 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 """This module provides shared functionality for systems to generate
 Dart APIs from the IDL database."""
 
 import copy
 import json
@@ skipping 83 matching lines @@
     'MutationObserver': 'MutationObserver,WebKitMutationObserver',
 
     'NodeList': 'NodeList,RadioNodeList',
 
     'RTCPeerConnection': 'RTCPeerConnection,mozRTCPeerConnection',
 
     'RTCIceCandidate': 'RTCIceCandidate,mozRTCIceCandidate',
 
     'RTCSessionDescription': 'RTCSessionDescription,mozRTCSessionDescription',
 
+    'RTCDataChannel': 'RTCDataChannel,DataChannel',
+
     'TransitionEvent': 'TransitionEvent,WebKitTransitionEvent',
 
     'WheelEvent': 'WheelEvent,MouseWheelEvent,MouseScrollEvent',
 
     'XMLHttpRequestUpload': 'XMLHttpRequestUpload,XMLHttpRequestEventTarget',
 
 }, dart2jsOnly=True)
 
 def IsRegisteredType(type_name):
   return type_name in _idl_type_registry
@@ skipping 1029 matching lines @@
           type_name, type_data, dart_interface_name, self)
 
     if type_data.clazz == 'BasicTypedList':
       dart_interface_name = self._renamer.RenameInterface(
           self._database.GetInterface(type_name))
       return BasicTypedListIDLTypeInfo(
           type_name, type_data, dart_interface_name, self)
 
     class_name = '%sIDLTypeInfo' % type_data.clazz
     return globals()[class_name](type_name, type_data)