Merge libv1.

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.dart");
-#import("dart:html");
-#import("dart:json");
+library chat;
+import 'dart:html';
+import 'dart:json';
 
 void main() {
   new Chat().start();
 }
 
 class Chat {
   void start() {
     Document doc = window.document;
     _joinButton = doc.query("#joinButton");
     _leaveButton = doc.query("#leaveButton");
@@ skipping 288 matching lines @@
   Element _chatSection;
   InputElement _messageInput;
   Element _messages;
   Element _statusText;
 
   String _session = null;
   int _nextMessage = 0;
   HttpRequest _pollRequest = null;
 
 }