net: remove UsingTCPFastOpen() method from StreamSocket class

net/socket/tcp_client_socket.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 NET_SOCKET_TCP_CLIENT_SOCKET_H_
 #define NET_SOCKET_TCP_CLIENT_SOCKET_H_
 
 #include <stdint.h>
 
 #include "base/compiler_specific.h"
@@ skipping 33 matching lines @@
   int Connect(const CompletionCallback& callback) override;
   void Disconnect() override;
   bool IsConnected() const override;
   bool IsConnectedAndIdle() const override;
   int GetPeerAddress(IPEndPoint* address) const override;
   int GetLocalAddress(IPEndPoint* address) const override;
   const BoundNetLog& NetLog() const override;
   void SetSubresourceSpeculation() override;
   void SetOmniboxSpeculation() override;
   bool WasEverUsed() const override;
-  bool UsingTCPFastOpen() const override;
   void EnableTCPFastOpenIfSupported() override;
   bool WasNpnNegotiated() const override;
   NextProto GetNegotiatedProtocol() const override;
   bool GetSSLInfo(SSLInfo* ssl_info) override;
 
   // Socket implementation.
   // Multiple outstanding requests are not supported.
   // Full duplex mode (reading and writing at the same time) is supported.
   int Read(IOBuffer* buf,
            int buf_len,
@@ skipping 70 matching lines @@
 
   // Total number of bytes received by the socket.
   int64_t total_received_bytes_;
 
   DISALLOW_COPY_AND_ASSIGN(TCPClientSocket);
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_TCP_CLIENT_SOCKET_H_