Add experimental option for TCP FastOpen....

net/socket/tcp_client_socket.h

 // Copyright (c) 2006-2009 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 NET_SOCKET_TCP_CLIENT_SOCKET_H_
 #define NET_SOCKET_TCP_CLIENT_SOCKET_H_
 #pragma once
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include "net/socket/tcp_client_socket_win.h"
 #elif defined(OS_POSIX)
 #include "net/socket/tcp_client_socket_libevent.h"
 #endif
 
 namespace net {
 
 // A client socket that uses TCP as the transport layer.
 #if defined(OS_WIN)
 typedef TCPClientSocketWin TCPClientSocket;
 #elif defined(OS_POSIX)
 typedef TCPClientSocketLibevent TCPClientSocket;
 #endif
 
+// Enable/disable experimental TCP FastOpen option.
+// Not thread safe.  Must be called during initialization/startup only.
+void set_tcp_fastopen_enabled(bool value);
+
+// Check if the TCP FastOpen option is enabled.
+bool is_tcp_fastopen_enabled();
+
 }  // namespace net
 
 #endif  // NET_SOCKET_TCP_CLIENT_SOCKET_H_