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