Remove support for attribute event listeners.

client/dom/generated/src/wrapping/_IDBRequestWrappingImplementation.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.
 
 class _IDBRequestWrappingImplementation extends DOMWrapperBase implements IDBRequest {
   _IDBRequestWrappingImplementation() : super() {}
 
   static create__IDBRequestWrappingImplementation() native {
     return new _IDBRequestWrappingImplementation();
   }
 
   int get errorCode() { return _get_errorCode(this); }
   static int _get_errorCode(var _this) native;
 
-  EventListener get onerror() { return _get_onerror(this); }
-  static EventListener _get_onerror(var _this) native;
-
-  void set onerror(EventListener value) { _set_onerror(this, value); }
-  static void _set_onerror(var _this, EventListener value) native;
-
-  EventListener get onsuccess() { return _get_onsuccess(this); }
-  static EventListener _get_onsuccess(var _this) native;
-
-  void set onsuccess(EventListener value) { _set_onsuccess(this, value); }
-  static void _set_onsuccess(var _this, EventListener value) native;
-
   int get readyState() { return _get_readyState(this); }
   static int _get_readyState(var _this) native;
 
   IDBAny get result() { return _get_result(this); }
   static IDBAny _get_result(var _this) native;
 
   IDBAny get source() { return _get_source(this); }
   static IDBAny _get_source(var _this) native;
 
   IDBTransaction get transaction() { return _get_transaction(this); }
@@ skipping 26 matching lines @@
     } else {
       _removeEventListener_2(this, type, listener, useCapture);
       return;
     }
   }
   static void _removeEventListener(receiver, type, listener) native;
   static void _removeEventListener_2(receiver, type, listener, useCapture) native;
 
   String get typeName() { return "IDBRequest"; }
 }