Generate EventListener attributes of non-EventTarget classes.

client/dom/generated/src/interface/IDBDatabase.dart

 // Copyright (c) 2011, 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 IDBDatabase {
 
   String get name();
 
+  EventListener get onabort();
+
+  void set onabort(EventListener value);
+
+  EventListener get onerror();
+
+  void set onerror(EventListener value);
+
+  EventListener get onversionchange();
+
+  void set onversionchange(EventListener value);
+
   String get version();
 
   void addEventListener(String type, EventListener listener, [bool useCapture]);
 
   void close();
 
   IDBObjectStore createObjectStore(String name);
 
   void deleteObjectStore(String name);
 
   bool dispatchEvent(Event evt);
 
   void removeEventListener(String type, EventListener listener, [bool useCapture]);
 
   IDBVersionChangeRequest setVersion(String version);
 
   IDBTransaction transaction(String storeName, int mode);
 }