Revert of net: merge two versions of SetTCPNoDelay() function into one

net/socket/tcp_socket.cc

-// Copyright 2016 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 "build/build_config.h"
-
-#if defined(OS_POSIX)
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netinet/tcp.h>
-#elif defined(OS_WIN)
-#include <winsock2.h>
-#endif
-
-namespace net {
-
-bool SetTCPNoDelay(SocketDescriptor socket, bool no_delay) {
-#if defined(OS_POSIX)
-  int on = no_delay ? 1 : 0;
-#elif defined(OS_WIN)
-  BOOL on = no_delay ? TRUE : FALSE;
-#endif
-  return setsockopt(socket, IPPROTO_TCP, TCP_NODELAY,
-                    reinterpret_cast<const char*>(&on), sizeof(on)) == 0;
-}
-
-}  // namespace net