Use 'field' syntax in dart:dom interfaces.

client/dom/generated/src/interface/HTMLProgressElement.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 HTMLProgressElement extends HTMLElement {
 
-  HTMLFormElement get form();
+  final HTMLFormElement form;
 
-  NodeList get labels();
+  final NodeList labels;
 
-  num get max();
+  num max;
 
-  void set max(num value);
+  final num position;
 
-  num get position();
-
-  num get value();
-
-  void set value(num value);
+  num value;
 }