Fix a bug in [http.BaseRequest.send]'s content length handling.

pkg/http/test/utils.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.
 
 library test_utils;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
@@ skipping 36 matching lines @@
       }
 
       if (path == '/redirect') {
         response.statusCode = 302;
         response.headers.set('location', serverUrl.resolve('/').toString());
         response.contentLength = 0;
         response.close();
         return;
       }
 
+      if (path == '/no-content-length') {
+        response.statusCode = 200;
+        response.contentLength = -1;
+        response.write('body');
+        response.close();
+        return;
+      }
+
       new ByteStream(request).toBytes().then((requestBodyBytes) {
         var outputEncoding;
         var encodingName = request.uri.queryParameters['response-encoding'];
         if (encodingName != null) {
           outputEncoding = requiredEncodingForCharset(encodingName);
         } else {
           outputEncoding = ASCII;
         }
 
         response.headers.contentType =
@@ skipping 131 matching lines @@
 const isSocketException = const _SocketException();
 
 /// A matcher for functions that throw SocketException.
 const Matcher throwsSocketException =
     const Throws(isSocketException);
 
 class _SocketException extends TypeMatcher {
   const _SocketException() : super("SocketException");
   bool matches(item, Map matchState) => item is SocketException;
 }