Support Chrome roll.

lib/dom/scripts/systemhtml.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 the system to generate
 Dart:html APIs from the IDL database."""
 
 import emitter
 
@@ skipping 391 matching lines @@
   'pageshow': 'pageShow',
   'paste': 'paste',
   'pause': 'pause',
   'play': 'play',
   'playing': 'playing',
   'popstate': 'popState',
   'progress': 'progress',
   'ratechange': 'rateChange',
   'readystatechange': 'readyStateChange',
   'removestream': 'removeStream',
+  'removetrack': 'removeTrack',
   'reset': 'reset',
   'resize': 'resize',
   'result': 'result',
   'resultdeleted': 'resultDeleted',
   'scroll': 'scroll',
   'search': 'search',
   'seeked': 'seeked',
   'seeking': 'seeking',
   'select': 'select',
   'selectionchange': 'selectionChange',
@@ skipping 988 matching lines @@
             Collect(database.GetInterface(parent.type.id),
                     seen, collected)
 
   inheritance_closure = {}
   for interface in database.GetInterfaces():
     seen = set()
     collected = []
     Collect(interface, seen, collected)
     inheritance_closure[interface.id] = collected
   return inheritance_closure