Use 'field' syntax in dart:dom interfaces.

client/dom/generated/src/interface/HTMLHRElement.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 HTMLHRElement extends HTMLElement {
 
-  String get align();
+  String align;
 
-  void set align(String value);
+  bool noShade;
 
-  bool get noShade();
+  String size;
 
-  void set noShade(bool value);
-
-  String get size();
-
-  void set size(String value);
-
-  String get width();
-
-  void set width(String value);
+  String width;
 }