Use UTF-8 when serving web pages for analysis server debug.

pkg/analysis_server/lib/src/status/element_writer.dart

 // Copyright (c) 2015, 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 analysis_server.src.status.element_writer;
 
-import 'package:analysis_server/src/status/utilities.dart';
+import 'dart:convert';
+
 import 'package:analyzer/src/generated/element.dart';
 
 /**
  * A visitor that will produce an HTML representation of an element structure.
  */
 class ElementWriter extends GeneralizingElementVisitor {
   /**
    * The buffer on which the HTML is to be written.
    */
   final StringBuffer buffer;
@@ skipping 10 matching lines @@
   ElementWriter(this.buffer);
 
   @override
   void visitElement(Element element) {
     for (int i = 0; i < indentLevel; i++) {
       buffer.write('&#x250A;&nbsp;&nbsp;&nbsp;');
     }
     if (element.isSynthetic) {
       buffer.write('<i>');
     }
-    buffer.write(encodeHtml(element.toString()));
+    buffer.write(HTML_ESCAPE.convert(element.toString()));
     if (element.isSynthetic) {
       buffer.write('</i>');
     }
     buffer.write(' <span style="color:gray">(');
     buffer.write(element.runtimeType);
     buffer.write(')</span><br>');
     indentLevel++;
     try {
       element.visitChildren(this);
     } finally {
       indentLevel--;
     }
   }
 }