Fix P2PSocketHostTcp to handle async write correctly.

content/browser/renderer_host/p2p/socket_host_tcp.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_P2P_SOCKET_HOST_TCP_H_
 #define CONTENT_BROWSER_RENDERER_HOST_P2P_SOCKET_HOST_TCP_H_
 
 #include <vector>
 
 #include "base/compiler_specific.h"
@@ skipping 47 matching lines @@
   void OnRead(int result);
   void OnWritten(int result);
 
   net::IPEndPoint remote_address_;
 
   scoped_ptr<net::StreamSocket> socket_;
   scoped_refptr<net::GrowableIOBuffer> read_buffer_;
 
   std::queue<scoped_refptr<net::DrainableIOBuffer> > write_queue_;
   scoped_refptr<net::DrainableIOBuffer> write_buffer_;
+  bool write_pending_;
 
   bool connected_;
 
   DISALLOW_COPY_AND_ASSIGN(P2PSocketHostTcp);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_P2P_SOCKET_HOST_TCP_H_