Use 'field' syntax in dart:dom interfaces.

client/dom/generated/src/interface/Screen.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 Screen {
 
-  int get availHeight();
+  final int availHeight;
 
-  int get availLeft();
+  final int availLeft;
 
-  int get availTop();
+  final int availTop;
 
-  int get availWidth();
+  final int availWidth;
 
-  int get colorDepth();
+  final int colorDepth;
 
-  int get height();
+  final int height;
 
-  int get pixelDepth();
+  final int pixelDepth;
 
-  int get width();
+  final int width;
 }