Use 'field' syntax in dart:dom interfaces.

client/dom/generated/src/interface/DatabaseSync.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 DatabaseSync {
 
-  String get lastErrorMessage();
+  final String lastErrorMessage;
 
-  String get version();
+  final String version;
 
   void changeVersion(String oldVersion, String newVersion, [SQLTransactionSyncCallback callback]);
 
   void readTransaction(SQLTransactionSyncCallback callback);
 
   void transaction(SQLTransactionSyncCallback callback);
 }