Use 'field' syntax in dart:dom interfaces.

client/dom/generated/src/interface/OperationNotAllowedException.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 OperationNotAllowedException {
 
   static final int NOT_ALLOWED_ERR = 1;
 
-  int get code();
+  final int code;
 
-  String get message();
+  final String message;
 
-  String get name();
+  final String name;
 
   String toString();
 }