Follow up to IDL roll.

tools/dom/scripts/htmleventgenerator.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 functionality to generate dart:html event classes."""
 
 import logging
 from generator import GetAnnotationsAndComments, FormatAnnotationsAndComments
 
@@ skipping 283 matching lines @@
   'FileWriter.writestart': ('writeStart', 'ProgressEvent'),
   'HTMLBodyElement.storage': ('storage', 'StorageEvent'),
   'HTMLInputElement.webkitSpeechChange': ('speechChange', 'Event'),
   'HTMLMediaElement.loadstart': ('loadStart', 'Event'),
   'HTMLMediaElement.progress': ('progress', 'Event'),
   'HTMLMediaElement.show': ('show', 'Event'),
   'HTMLMediaElement.webkitkeyadded': ('keyAdded', 'MediaKeyEvent'),
   'HTMLMediaElement.webkitkeyerror': ('keyError', 'MediaKeyEvent'),
   'HTMLMediaElement.webkitkeymessage': ('keyMessage', 'MediaKeyEvent'),
   'HTMLMediaElement.webkitneedkey': ('needKey', 'MediaKeyEvent'),
-  'IDBDatabase.versionchange': ('versionChange', 'UpgradeNeededEvent'),
+  'IDBDatabase.versionchange': ('versionChange', 'VersionChangeEvent'),
   'IDBOpenDBRequest.blocked': ('blocked', 'Event'),
   'IDBOpenDBRequest.upgradeneeded': ('upgradeNeeded', 'VersionChangeEvent'),
   'IDBRequest.success': ('success', 'Event'),
   'IDBTransaction.complete': ('complete', 'Event'),
   'IDBVersionChangeRequest.blocked': ('blocked', 'Event'),
   'MediaController.play': ('play', 'Event'),
   'MediaStreamTrack.mute': ('mute', 'Event'),
   'MediaStreamTrack.unmute': ('unmute', 'Event'),
   'MediaStreamTrackList.addtrack': ('addTrack', 'MediaStreamTrackEvent'),
   'MediaStreamTrackList.removetrack': ('removeTrack', 'MediaStreamTrackEvent'),
@@ skipping 276 matching lines @@
     parent_events_class_name = 'Events'
     interfaces_with_events = set()
     for parent in self._database.Hierarchy(interface):
       if parent != interface and parent.id in self._event_classes:
         parent_name = self._renamer.RenameInterface(parent)
         parent_events_class_name = parent_name + 'Events'
         interfaces_with_events.add(parent)
     if len(interfaces_with_events) > 1:
       raise Exception('Only one parent event class allowed ' + interface.id)
     return parent_events_class_name