Remove deprecated StringBuffer.add, addAll and addCharCode.

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 199 matching lines @@
     _messageInput.focus();
     showStatus("Status...");
   }
 
   void uiAddMessage(Map message) {
     ParagraphElement p = new Element.tag('p');
     String formattedTime = formatMessageTime(message["received"]);
     String from = message["from"];
     StringBuffer text = new StringBuffer("$formattedTime $from ");
     if (message["type"] == "join") {
-      text.add("joined");
+      text.write("joined");
     } else if (message["type"] == "message") {
-      text.add(message["message"]);
+      text.write(message["message"]);
     } else if (message["type"] == "leave") {
-      text.add("left");
+      text.write("left");
     } else {
-      text.add("timeout");
+      text.write("timeout");
     }
     p.text = text.toString();
     _messages.insertAdjacentElement('afterBegin', p);
     if (_messages.children.length > 20) {
       _messages.children.removeLast();
     }
   }
 
   String formatMessageTime(String received) {
     DateTime date = DateTime.parse(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);
+    if (date.hour < 10) formattedTime.write("0");
+    formattedTime.write(date.hour);
+    formattedTime.write(":");
+    if (date.minute < 10) formattedTime.write("0");
+    formattedTime.write(date.minute);
+    formattedTime.write(":");
+    if (date.second < 10) formattedTime.write("0");
+    formattedTime.write(date.second);
     return formattedTime.toString();
   }
 
   String formatUpTime(int upTime) {
     var upTime = (upTime ~/ 1000);
     int hours = (upTime ~/ (60 * 60));
     upTime = upTime % (60 * 60);
     int minutes = (upTime ~/ 60);
     upTime = upTime % 60;
     int seconds = upTime;
     StringBuffer formattedTime = new StringBuffer();
-    if (hours < 10) formattedTime.add("0");
-    formattedTime.add(hours);
-    formattedTime.add(":");
-    if (minutes < 10) formattedTime.add("0");
-    formattedTime.add(minutes);
-    formattedTime.add(":");
-    if (seconds < 10) formattedTime.add("0");
-    formattedTime.add(seconds);
+    if (hours < 10) formattedTime.write("0");
+    formattedTime.write(hours);
+    formattedTime.write(":");
+    if (minutes < 10) formattedTime.write("0");
+    formattedTime.write(minutes);
+    formattedTime.write(":");
+    if (seconds < 10) formattedTime.write("0");
+    formattedTime.write(seconds);
     return formattedTime.toString();
   }
 
   void protocolError() {
     uiJoin();
     showStatus("Protocol error!");
   }
 
   void showStatus(status) {
     _statusText.text = status;
@@ skipping 31 matching lines @@
   Element _chatSection;
   InputElement _messageInput;
   Element _messages;
   Element _statusText;
 
   String _session = null;
   int _nextMessage = 0;
   HttpRequest _pollRequest = null;
 
 }