Regenerate dart:dom and dart:html bindings

client/html/generated/html/interface/TrackElement.dart

 // 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.
 
 // WARNING: Do not edit - generated code.
 
 interface TrackElement extends Element {
 
-  static final int ERROR = 3;
-
   static final int LOADED = 2;
 
   static final int LOADING = 1;
 
   static final int NONE = 0;
 
   bool isDefault;
 
   String kind;
 
   String label;
 
   final int readyState;
 
   String src;
 
   String srclang;
 
   final TextTrack track;
 }