Remove deprecated string features.

tests/standalone/io/http_parser_test.dart

 // Copyright (c) 2013, 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:async';
 import 'dart:math';
 import 'dart:scalarlist';
 import 'dart:isolate';
 import 'dart:uri';
 
@@ skipping 107 matching lines @@
       for (int pos = 0; pos < requestData.length; pos += chunkSize) {
         int remaining = requestData.length - pos;
         int writeLength = min(chunkSize, remaining);
         controller.add(requestData.getRange(pos, writeLength));
       }
       controller.close();
     }
 
     // Test parsing the request three times delivering the data in
     // different chunks.
-    List<int> requestData = request.charCodes;
+    List<int> requestData = request.codeUnits;
     testWrite(requestData);
     testWrite(requestData, 10);
     testWrite(requestData, 1);
   }
 
   static void _testParseInvalidRequest(String request) {
     _HttpParser httpParser;
     bool errorCalled;
     StreamController controller;
 
@@ skipping 23 matching lines @@
            pos += chunkSize) {
         int remaining = requestData.length - pos;
         int writeLength = min(chunkSize, remaining);
         controller.add(requestData.getRange(pos, writeLength));
       }
       controller.close();
     }
 
     // Test parsing the request three times delivering the data in
     // different chunks.
-    List<int> requestData = request.charCodes;
+    List<int> requestData = request.codeUnits;
     testWrite(requestData);
     testWrite(requestData, 10);
     testWrite(requestData, 1);
   }
 
   static void _testParseResponse(String response,
                                  int expectedStatusCode,
                                  String expectedReasonPhrase,
                                  {int expectedTransferLength: 0,
                                   int expectedBytesReceived: 0,
@@ skipping 80 matching lines @@
         int remaining = requestData.length - pos;
         int writeLength = min(chunkSize, remaining);
         controller.add(requestData.getRange(pos, writeLength));
 
       }
       if (close) controller.close();
     }
 
     // Test parsing the request three times delivering the data in
     // different chunks.
-    List<int> responseData = response.charCodes;
+    List<int> responseData = response.codeUnits;
     testWrite(responseData);
     testWrite(responseData, 10);
     testWrite(responseData, 1);
   }
 
   static void _testParseInvalidResponse(String response, [bool close = false]) {
     _HttpParser httpParser;
     bool errorCalled;
     StreamController controller;
 
@@ skipping 29 matching lines @@
            pos += chunkSize) {
         int remaining = requestData.length - pos;
         int writeLength = min(chunkSize, remaining);
         controller.add(requestData.getRange(pos, writeLength));
       }
       controller.close();
     }
 
     // Test parsing the request three times delivering the data in
     // different chunks.
-    List<int> responseData = response.charCodes;
+    List<int> responseData = response.codeUnits;
     testWrite(responseData);
     testWrite(responseData, 10);
     testWrite(responseData, 1);
   }
 
   static void testParseRequest() {
     String request;
     Map headers;
     var methods = [
         // RFC 2616 methods.
@@ skipping 540 matching lines @@
 0123456789012345678901234567890\r
 0\r\n\r\n""";
     _testParseInvalidResponse(response);
   }
 }
 
 
 void main() {
   HttpParserTest.runAllTests();
 }