Remove deprecated string features.

sdk/lib/io/mime_multipart_parser.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.
 
 part of dart.io;
 
 /**
  * Parser for MIME multipart types of data as described in RFC 2046
  * section 5.1.1. The data to parse is supplied through the [:update:]
  * method. As the data is parsed the following callbacks are called:
@@ skipping 23 matching lines @@
   const int _LAST_BOUNDARY_DASH2 = 11;
   const int _LAST_BOUNDARY_ENDING = 12;
   const int _LAST_BOUNDARY_END = 13;
   const int _DONE = 14;
   const int _FAILURE = 15;
 
   // Construct a new MIME multipart parser with the boundary
   // [boundary]. The boundary should be as specified in the content
   // type parameter, that is without the -- prefix.
   _MimeMultipartParser(String boundary) {
-    List<int> charCodes = boundary.charCodes;
+    List<int> charCodes = boundary.codeUnits;
     _boundary = new List<int>.fixedLength(4 + charCodes.length);
     // Set-up the matching boundary preceding it with CRLF and two
     // dashes.
     _boundary[0] = _CharCode.CR;
     _boundary[1] = _CharCode.LF;
     _boundary[2] = _CharCode.DASH;
     _boundary[3] = _CharCode.DASH;
     _boundary.setRange(4, charCodes.length, charCodes);
     _state = _START;
     _headerField = new StringBuffer();
@@ skipping 231 matching lines @@
       reportData();
     }
     return index - offset;
   }
 
   bool _isTokenChar(int byte) {
     return byte > 31 && byte < 128 && _Const.SEPARATORS.indexOf(byte) == -1;
   }
 
   int _toLowerCase(int byte) {
-    final int aCode = "A".charCodeAt(0);
-    final int zCode = "Z".charCodeAt(0);
-    final int delta = "a".charCodeAt(0) - aCode;
+    final int aCode = "A".codeUnitAt(0);
+    final int zCode = "Z".codeUnitAt(0);
+    final int delta = "a".codeUnitAt(0) - aCode;
     return (aCode <= byte && byte <= zCode) ? byte + delta : byte;
   }
 
   void _expect(int val1, int val2) {
     if (val1 != val2) {
       throw new MimeParserException("Failed to parse multipart mime 1");
     }
   }
 
   void _expectWS(int byte) {
@@ skipping 15 matching lines @@
   Function partDataReceived;
   Function partEnd;
 }
 
 
 class MimeParserException implements Exception {
   const MimeParserException([String this.message = ""]);
   String toString() => "MimeParserException: $message";
   final String message;
 }