Remove deprecated string features.

samples/third_party/dromaeo/common/BenchUtil.dart

 // Copyright (c) 2011, 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.
 
 part of common;
 
 // Misc benchmark-related utility functions.
 
 class BenchUtil {
   static int get now {
@@ skipping 21 matching lines @@
 
   static String formatGolemData(String prefix, Map<String, num> results) {
     List<String> elements = new List<String>();
     results.forEach((String name, num score) {
       elements.add('"${prefix}/${name}":${score}');
     });
     return serialize(elements);
   }
 
   static bool _inRange(int charCode, String start, String end) {
-    return start.charCodeAt(0) <= charCode && charCode <= end.charCodeAt(0);
+    return start.codeUnitAt(0) <= charCode && charCode <= end.codeUnitAt(0);
   }
 
   static const String DIGITS = '0123456789ABCDEF';
   static String _asDigit(int value) {
     return DIGITS[value];
   }
 
   static String encodeUri(final String s) {
     StringBuffer sb = new StringBuffer();
     for (int i = 0; i < s.length; i++) {
-      final int charCode = s.charCodeAt(i);
+      final int charCode = s.codeUnitAt(i);
       final bool noEscape =
           _inRange(charCode, '0', '9') ||
           _inRange(charCode, 'a', 'z') ||
           _inRange(charCode, 'A', 'Z');
       if (noEscape) {
         sb.add(s[i]);
       } else {
        sb.add('%');
        sb.add(_asDigit((charCode >> 4) & 0xF));
        sb.add(_asDigit(charCode & 0xF));
@@ skipping 11 matching lines @@
     for (Match match in new RegExp(pattern).allMatches(s)) {
       sb.add(s.substring(pos, match.start));
       sb.add(replacement(match));
       pos = match.end;
     }
     sb.add(s.substring(pos));
 
     return sb.toString();
   }
 }