net: remove UsingTCPFastOpen() method from StreamSocket class

net/socket/ssl_client_socket_openssl.h

 // Copyright (c) 2012 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_SSL_CLIENT_SOCKET_OPENSSL_H_
 #define NET_SOCKET_SSL_CLIENT_SOCKET_OPENSSL_H_
 
 #include <openssl/base.h>
 #include <openssl/ssl.h>
 #include <stddef.h>
@@ skipping 81 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;
   bool GetSSLInfo(SSLInfo* ssl_info) override;
   void GetConnectionAttempts(ConnectionAttempts* out) const override;
   void ClearConnectionAttempts() override {}
   void AddConnectionAttempts(const ConnectionAttempts& attempts) override {}
   int64_t GetTotalReceivedBytes() const override;
 
   // Socket implementation.
   int Read(IOBuffer* buf,
            int buf_len,
            const CompletionCallback& callback) override;
@@ skipping 251 matching lines @@
   // pinning failure. It is a (somewhat) human-readable string.
   std::string pinning_failure_log_;
 
   BoundNetLog net_log_;
   base::WeakPtrFactory<SSLClientSocketOpenSSL> weak_factory_;
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_SSL_CLIENT_SOCKET_OPENSSL_H_