Add touchenter event even though it doesn't have an ontouchenter method in the DOM.

lib/html/frog/html_frog.dart

 #library('html');
 
 // 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.
 
 // DO NOT EDIT
 // Auto-generated dart:html library.
 
 
@@ skipping 6263 matching lines @@
   EventListenerList get select() => _get('select');
 
   EventListenerList get selectStart() => _get('selectstart');
 
   EventListenerList get submit() => _get('submit');
 
   EventListenerList get touchCancel() => _get('touchcancel');
 
   EventListenerList get touchEnd() => _get('touchend');
 
+  EventListenerList get touchEnter() => _get('touchenter');
+
   EventListenerList get touchLeave() => _get('touchleave');
 
   EventListenerList get touchMove() => _get('touchmove');
 
   EventListenerList get touchStart() => _get('touchstart');
 
   EventListenerList get transitionEnd() => _get('webkitTransitionEnd');
 }
 
 class _ElementTimeControlImpl implements ElementTimeControl native "*ElementTimeControl" {
@@ skipping 15349 matching lines @@
   EventListenerList get select();
 
   EventListenerList get selectStart();
 
   EventListenerList get submit();
 
   EventListenerList get touchCancel();
 
   EventListenerList get touchEnd();
 
+  EventListenerList get touchEnter();
+
   EventListenerList get touchLeave();
 
   EventListenerList get touchMove();
 
   EventListenerList get touchStart();
 
   EventListenerList get transitionEnd();
 }
 // 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
@@ skipping 10828 matching lines @@
     if (length < 0) throw new IllegalArgumentException('length');
     if (start < 0) throw new IndexOutOfRangeException(start);
     int end = start + length;
     if (end > a.length) throw new IndexOutOfRangeException(end);
     for (int i = start; i < end; i++) {
       accumulator.add(a[i]);
     }
     return accumulator;
   }
 }