Use 'field' syntax in dart:dom interfaces.

client/dom/generated/src/interface/Coordinates.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 Coordinates {
 
-  num get accuracy();
+  final num accuracy;
 
-  num get altitude();
+  final num altitude;
 
-  num get altitudeAccuracy();
+  final num altitudeAccuracy;
 
-  num get heading();
+  final num heading;
 
-  num get latitude();
+  final num latitude;
 
-  num get longitude();
+  final num longitude;
 
-  num get speed();
+  final num speed;
 }