Close HttpServer in WebSocket tests.

sdk/lib/io/websocket_impl.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.
 
 part of dart.io;
 
 const String _webSocketGUID = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
 
 class _WebSocketMessageType {
   static const int NONE = 0;
@@ skipping 544 matching lines @@
         (data) => _processor.update(data, 0, data.length),
         onDone: () => _processor.closed(),
         onError: (error) => _controller.signalError(error));
 
     _socket.done
         .catchError((error) {
           if (_readyState == WebSocket.CLOSED) return;
           _readyState = WebSocket.CLOSED;
           _controller.signalError(error);
           _controller.close();
-          _processor.closed();
           _socket.destroy();
         })
         .whenComplete(() {
           _writeClosed = true;
         });
   }
 
   StreamSubscription<Event> listen(void onData(Event event),
                                    {void onError(AsyncError error),
                                     void onDone(),
@@ skipping 116 matching lines @@
 
 class _WebSocketCloseEvent implements CloseEvent {
   _WebSocketCloseEvent(this._wasClean, this._code, this._reason);
   bool get wasClean => _wasClean;
   int get code => _code;
   String get reason => _reason;
   bool _wasClean;
   int _code;
   String _reason;
 }