Removing the Window.clientInformation property as it's an IE legacy version of Window.navigator.

sdk/lib/html/dart2js/html_dart2js.dart

 library html;
 
 import 'dart:isolate';
 import 'dart:json';
 import 'dart:svg' as svg;
 // Copyright (c) 2012, 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.
 
 // DO NOT EDIT
@@ skipping 11491 matching lines @@
   LocalWindowEvents get on =>
     new LocalWindowEvents(this);
 
   static const int PERSISTENT = 1;
 
   static const int TEMPORARY = 0;
 
   /** @domName Window.applicationCache */
   final DOMApplicationCache applicationCache;
 
-  /** @domName Window.clientInformation */
-  final Navigator clientInformation;
-
   /** @domName Window.closed */
   final bool closed;
 
   /** @domName Window.console */
   final Console console;
 
   /** @domName Window.crypto */
   final Crypto crypto;
 
   /** @domName Window.defaultStatus */
@@ skipping 13327 matching lines @@
     if (length < 0) throw new ArgumentError('length');
     if (start < 0) throw new RangeError.value(start);
     int end = start + length;
     if (end > a.length) throw new RangeError.value(end);
     for (int i = start; i < end; i++) {
       accumulator.add(a[i]);
     }
     return accumulator;
   }
 }