Use 'field' syntax in dart:dom interfaces.

client/dom/generated/src/interface/Clipboard.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 Clipboard {
 
-  String get dropEffect();
+  String dropEffect;
 
-  void set dropEffect(String value);
+  String effectAllowed;
 
-  String get effectAllowed();
+  final FileList files;
 
-  void set effectAllowed(String value);
+  final DataTransferItemList items;
 
-  FileList get files();
-
-  DataTransferItemList get items();
-
-  List get types();
+  final List types;
 
   void clearData([String type]);
 
   void getData(String type);
 
   bool setData(String type, String data);
 
   void setDragImage(HTMLImageElement image, int x, int y);
 }