Change the handling og the HTTP content length

tests/standalone/io/http_parser_test.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.
 
 #import('dart:math');
 #import('dart:scalarlist');
 
 #source("../../../runtime/bin/http_parser.dart");
 
 class HttpParserTest {
   static void runAllTests() {
     testParseRequest();
     testParseResponse();
     testParseInvalidRequest();
     testParseInvalidResponse();
   }
 
   static void _testParseRequest(String request,
                                 String expectedMethod,
                                 String expectedUri,
-                                {int expectedContentLength: -1,
+                                {int expectedContentLength: 0,
                                  int expectedBytesReceived: 0,
                                  Map expectedHeaders: null,
                                  bool chunked: false,
                                  bool upgrade: false,
                                  int unparsedLength: 0,
                                  bool connectionClose: false,
                                  String expectedVersion: "1.1"}) {
     _HttpParser httpParser;
     bool headersCompleteCalled;
     bool dataEndCalled;
@@ skipping 805 matching lines @@
 0123456789012345678901234567890\r
 0\r\n\r\n""";
     _testParseInvalidResponse(response);
   }
 }
 
 
 void main() {
   HttpParserTest.runAllTests();
 }