Use 'field' syntax in dart:dom interfaces.

client/dom/generated/src/interface/Float64Array.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 Float64Array extends ArrayBufferView, List<num> default _TypedArrayFactoryProvider {
 
   Float64Array(int length);
 
   Float64Array.fromList(List<num> list);
 
   Float64Array.fromBuffer(ArrayBuffer buffer);
 
   static final int BYTES_PER_ELEMENT = 8;
 
-  int get length();
+  final int length;
 
   void setElements(Object array, [int offset]);
 
   Float64Array subarray(int start, [int end]);
 }