Remove deprecated string features.

pkg/http/lib/src/utils.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 utils;
 
 import 'dart:async';
 import 'dart:crypto';
 import 'dart:io';
 import 'dart:scalarlist';
@@ skipping 93 matching lines @@
 
 /// Converts [bytes] into a [String] according to [encoding].
 String decodeString(List<int> bytes, Encoding encoding) {
   // TODO(nweiz): implement this once issue 6284 is fixed.
   return new String.fromCharCodes(bytes);
 }
 
 /// Converts [string] into a byte array according to [encoding].
 List<int> encodeString(String string, Encoding encoding) {
   // TODO(nweiz): implement this once issue 6284 is fixed.
-  return string.charCodes;
+  return string.codeUnits;
 }
 
 /// A regular expression that matches strings that are composed entirely of
 /// ASCII-compatible characters.
 final RegExp _ASCII_ONLY = new RegExp(r"^[\x00-\x7F]+$");
 
 /// Returns whether [string] is composed entirely of ASCII-compatible
 /// characters.
 bool isPlainAscii(String string) => _ASCII_ONLY.hasMatch(string);
 
@@ skipping 190 matching lines @@
 /// [StreamController]. This exists to work around issue 8310.
 Stream wrapStream(Stream stream) {
   var controller = stream.isBroadcast
       ? new StreamController.broadcast()
       : new StreamController();
   stream.listen(controller.add,
       onError: (e) => controller.signalError(e),
       onDone: controller.close);
   return controller.stream;
 }