Use 'field' syntax in dart:dom interfaces.

client/dom/generated/src/interface/CSSRule.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 CSSRule {
 
   static final int CHARSET_RULE = 2;
 
   static final int FONT_FACE_RULE = 5;
 
   static final int IMPORT_RULE = 3;
 
   static final int MEDIA_RULE = 4;
 
   static final int PAGE_RULE = 6;
 
   static final int STYLE_RULE = 1;
 
   static final int UNKNOWN_RULE = 0;
 
   static final int WEBKIT_KEYFRAMES_RULE = 8;
 
   static final int WEBKIT_KEYFRAME_RULE = 9;
 
   static final int WEBKIT_REGION_RULE = 10;
 
-  String get cssText();
+  String cssText;
 
-  void set cssText(String value);
+  final CSSRule parentRule;
 
-  CSSRule get parentRule();
+  final CSSStyleSheet parentStyleSheet;
 
-  CSSStyleSheet get parentStyleSheet();
-
-  int get type();
+  final int type;
 }