Fix issue 8379

sdk/lib/io/http_impl.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;
 
 // The close queue handles graceful closing of HTTP connections. When
 // a connection is added to the queue it will enter a wait state
 // waiting for all data written and possibly socket shutdown from
 // peer.
@@ skipping 383 matching lines @@
     return _buffer.length;
   }
 
   List<int> _streamRead(int bytesToRead) {
     return _buffer.readBytes(bytesToRead);
   }
 
   int _streamReadInto(List<int> buffer, int offset, int len) {
     List<int> data = _buffer.readBytes(len);
     buffer.setRange(offset, data.length, data);
+    return data.length;
   }
 
   void _streamSetErrorHandler(callback(e)) {
     _streamErrorHandler = callback;
   }
 
   String _method;
   String _uri;
   String _path;
   String _queryString;
@@ skipping 1908 matching lines @@
 
 
 class _RedirectInfo implements RedirectInfo {
   const _RedirectInfo(int this.statusCode,
                       String this.method,
                       Uri this.location);
   final int statusCode;
   final String method;
   final Uri location;
 }