net: remove UsingTCPFastOpen() method from StreamSocket class

net/socket/tcp_socket_posix.cc

 // Copyright 2013 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.
 
 #include "net/socket/tcp_socket.h"
 
 #include <errno.h>
 #include <netinet/tcp.h>
 #include <sys/socket.h>
 
@@ skipping 415 matching lines @@
       tcp_fastopen_status_ == TCP_FASTOPEN_PREVIOUSLY_FAILED) {
     UMA_HISTOGRAM_ENUMERATION("Net.TcpFastOpenSocketConnection",
                               tcp_fastopen_status_, TCP_FASTOPEN_MAX_VALUE);
   }
   use_tcp_fastopen_ = false;
   tcp_fastopen_connected_ = false;
   tcp_fastopen_write_attempted_ = false;
   tcp_fastopen_status_ = TCP_FASTOPEN_STATUS_UNKNOWN;
 }
 
-bool TCPSocketPosix::UsingTCPFastOpen() const {
-  return use_tcp_fastopen_;
-}
-
 void TCPSocketPosix::EnableTCPFastOpenIfSupported() {
   if (!IsTCPFastOpenSupported())
     return;
 
   // Do not enable TCP FastOpen if it had previously failed.
   // This check conservatively avoids middleboxes that may blackhole
   // TCP FastOpen SYN+Data packets; on such a failure, subsequent sockets
   // should not use TCP FastOpen.
-  if(!g_tcp_fastopen_has_failed)
+  if (!g_tcp_fastopen_has_failed)
     use_tcp_fastopen_ = true;
   else
     tcp_fastopen_status_ = TCP_FASTOPEN_PREVIOUSLY_FAILED;
 }
 
 bool TCPSocketPosix::IsValid() const {
   return socket_ != NULL && socket_->socket_fd() != kInvalidSocket;
 }
 
 void TCPSocketPosix::DetachFromThread() {
@@ skipping 294 matching lines @@
     if (info.tcpi_rtt > 0) {
       *out_rtt = base::TimeDelta::FromMicroseconds(info.tcpi_rtt);
       return true;
     }
   }
 #endif  // defined(TCP_INFO)
   return false;
 }
 
 }  // namespace net