Convert DOM and HTML frog to dart2js.

lib/html/src/dart2js_IDBOpenDBRequestImplementation.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.
 
 // IDBOpenDBRequest.  IDBFactory.open returns a plain IDBRequest on Chrome and
 // Dartium but an IDBOpenDBRequest on Firefox.  Chrome/Dartium is expected to
 // change at some point as IDBOpenDBRequest is more standard.  When it appears
 // in the WebKit IDL we can remove this hand-written file.
 //
 // See:
 // http://www.w3.org/TR/IndexedDB/#request-api
 // http://dvcs.w3.org/hg/IndexedDB/raw-file/tip/Overview.html#request-api
 
 class _IDBOpenDBRequestImpl extends _IDBRequestImpl implements IDBOpenDBRequest
     native "*IDBOpenDBRequest" {
 
   _IDBOpenDBRequestEventsImpl get on() =>
     new _IDBOpenDBRequestEventsImpl(this);
 }
 
 class _IDBOpenDBRequestEventsImpl extends _IDBRequestEventsImpl implements IDBOpenDBRequestEvents {
   _IDBOpenDBRequestEventsImpl(_ptr) : super(_ptr);
 
   EventListenerList get blocked() => _get('blocked');
 
   EventListenerList get upgradeneeded() => _get('upgradeneeded');
 }