net: remove UsingTCPFastOpen() method from StreamSocket class

net/http/http_proxy_client_socket.cc

 // 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.
 
 #include "net/http/http_proxy_client_socket.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/profiler/scoped_tracker.h"
 #include "base/strings/string_util.h"
@@ skipping 156 matching lines @@
 }
 
 bool HttpProxyClientSocket::WasEverUsed() const {
   if (transport_.get() && transport_->socket()) {
     return transport_->socket()->WasEverUsed();
   }
   NOTREACHED();
   return false;
 }
 
-bool HttpProxyClientSocket::UsingTCPFastOpen() const {
-  if (transport_.get() && transport_->socket()) {
-    return transport_->socket()->UsingTCPFastOpen();
-  }
-  NOTREACHED();
-  return false;
-}
-
 bool HttpProxyClientSocket::WasNpnNegotiated() const {
   if (transport_.get() && transport_->socket()) {
     return transport_->socket()->WasNpnNegotiated();
   }
   NOTREACHED();
   return false;
 }
 
 NextProto HttpProxyClientSocket::GetNegotiatedProtocol() const {
   if (transport_.get() && transport_->socket()) {
@@ skipping 339 matching lines @@
     next_state_ = STATE_DRAIN_BODY;
     return OK;
   }
 
   return DidDrainBodyForAuthRestart();
 }
 
 //----------------------------------------------------------------
 
 }  // namespace net