Remove deprecated StringBuffer.add, addAll and addCharCode.

utils/template/uitest.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.
 
 import 'dart:html';
 import 'template.dart';
 import '../lib/file_system_memory.dart';
 
 String currSampleTemplate;
 
@@ skipping 367 matching lines @@
 
   bool templateValid = true;
   StringBuffer dumpTree = new StringBuffer();
   StringBuffer code = new StringBuffer();
   String htmlTemplate = template.value;
 
   if (debug) {
     try {
       List<Template> templates = templateParseAndValidate(htmlTemplate);
       for (var tmpl in templates) {
-        dumpTree.add(tmpl.toDebugString());
+        dumpTree.write(tmpl.toDebugString());
       }
 
       // Generate the Dart class(es) for all template(s).
       // Pass in filename of 'foo' for testing in UITest.
-      code.add(Codegen.generate(templates, 'foo'));
+      code.write(Codegen.generate(templates, 'foo'));
     } catch (htmlException) {
       // TODO(terry): TBD
       print("ERROR unhandled EXCEPTION");
     }
   }
 
 /*
   if (!debug) {
     try {
       cssParseAndValidate(cssExpr, cssWorld);
@@ skipping 160 matching lines @@
   initHtmlWorld(false);
 
   // Don't display any colors in the UI.
   options.useColors = false;
 
   // Replace error handler bring up alert for any problems.
   world.printHandler = (String msg) {
     window.alert(msg);
   };
 }