Rename Date to DateTime.

samples/chat/dart_client/chat.dart

 // 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.
 
 library chat;
 import 'dart:html';
 import 'dart:json' as jsonlib;
 
 void main() {
   new Chat().start();
@@ skipping 215 matching lines @@
       text.add("timeout");
     }
     p.text = text.toString();
     _messages.insertAdjacentElement('afterBegin', p);
     if (_messages.children.length > 20) {
       _messages.children.removeLast();
     }
   }
 
   String formatMessageTime(String received) {
-    Date date = new Date.fromString(received);
+    DateTime date = new DateTime.fromString(received);
     StringBuffer formattedTime = new StringBuffer();
     if (date.hour < 10) formattedTime.add("0");
     formattedTime.add(date.hour);
     formattedTime.add(":");
     if (date.minute < 10) formattedTime.add("0");
     formattedTime.add(date.minute);
     formattedTime.add(":");
     if (date.second < 10) formattedTime.add("0");
     formattedTime.add(date.second);
     return formattedTime.toString();
@@ skipping 59 matching lines @@
   Element _chatSection;
   InputElement _messageInput;
   Element _messages;
   Element _statusText;
 
   String _session = null;
   int _nextMessage = 0;
   HttpRequest _pollRequest = null;
 
 }