Use 'field' syntax in dart:dom interfaces.

client/dom/generated/src/interface/IDBKeyRange.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 IDBKeyRange {
 
-  IDBKey get lower();
+  final IDBKey lower;
 
-  bool get lowerOpen();
+  final bool lowerOpen;
 
-  IDBKey get upper();
+  final IDBKey upper;
 
-  bool get upperOpen();
+  final bool upperOpen;
 
   IDBKeyRange bound(IDBKey lower, IDBKey upper, [bool lowerOpen, bool upperOpen]);
 
   IDBKeyRange lowerBound(IDBKey bound, [bool open]);
 
   IDBKeyRange only(IDBKey value);
 
   IDBKeyRange upperBound(IDBKey bound, [bool open]);
 }