Fix handling to responses to HEAD requests

sdk/lib/io/http_parser.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.
 
 part of dart.io;
 
 // Global constants.
 class _Const {
   // Bytes for "HTTP".
   static const HTTP = const [72, 84, 84, 80];
@@ skipping 548 matching lines @@
               _incoming.reasonPhrase =
                   new String.fromCharCodes(_uri_or_reason_phrase);
             }
             _method_or_status_code.clear();
             _uri_or_reason_phrase.clear();
             if (_connectionUpgrade) {
               _incoming.upgraded = true;
               _controller.add(_incoming);
               break;
             }
-            if (_chunked) {
-              _state = _State.CHUNK_SIZE;
-              _remainingContent = 0;
-            } else if (_transferLength == 0 ||
-                         (_messageType == _MessageType.RESPONSE &&
-                          (_noMessageBody || _responseToMethod == "HEAD"))) {
+            if (_transferLength == 0 ||
+                (_messageType == _MessageType.RESPONSE &&
+                 (_noMessageBody || _responseToMethod == "HEAD"))) {
               _reset();
               var tmp = _incoming;
               _closeIncoming();
               _controller.add(tmp);
               break;
+            } else if (_chunked) {
+              _state = _State.CHUNK_SIZE;
+              _remainingContent = 0;
             } else if (_transferLength > 0) {
               _remainingContent = _transferLength;
               _state = _State.BODY;
             } else {
               // Neither chunked nor content length. End of body
               // indicated by close.
               _state = _State.BODY;
             }
             _controller.add(_incoming);
             break;
@@ skipping 380 matching lines @@
   StreamController<_HttpIncoming> _controller;
   StreamController<List<int>> _bodyController;
 }
 
 
 class HttpParserException implements Exception {
   const HttpParserException([String this.message = ""]);
   String toString() => "HttpParserException: $message";
   final String message;
 }