Move UseNonBlockingIO from a windows-only method

net/udp/udp_socket_perftest.cc

Index: net/udp/udp_socket_perftest.cc
diff --git a/net/udp/udp_socket_perftest.cc b/net/udp/udp_socket_perftest.cc
index c0c1db27bff2ce64eef975ec0b559ec408ea0f9e..059d019c92fc0d06cd513db31e87de2f29db9b17 100644
--- a/net/udp/udp_socket_perftest.cc
+++ b/net/udp/udp_socket_perftest.cc
@@ -94,10 +94,8 @@ void UDPSocketPerfTest::WriteBenchmark(bool use_nonblocking_io) {
   CreateUDPAddress("127.0.0.1", kPort, &bind_address);
   std::unique_ptr<UDPServerSocket> server(
       new UDPServerSocket(nullptr, NetLog::Source()));
-#if defined(OS_WIN)
   if (use_nonblocking_io)
     server->UseNonBlockingIO();
-#endif
   int rv = server->Listen(bind_address);
   ASSERT_THAT(rv, IsOk());
 
@@ -107,10 +105,8 @@ void UDPSocketPerfTest::WriteBenchmark(bool use_nonblocking_io) {
   std::unique_ptr<UDPClientSocket> client(
       new UDPClientSocket(DatagramSocket::DEFAULT_BIND, RandIntCallback(),
                           nullptr, NetLog::Source()));
-#if defined(OS_WIN)
   if (use_nonblocking_io)
     client->UseNonBlockingIO();
-#endif
   rv = client->Connect(server_address);
   EXPECT_THAT(rv, IsOk());
 
@@ -130,12 +126,10 @@ TEST_F(UDPSocketPerfTest, Write) {
   WriteBenchmark(false);
 }
 
-#if defined(OS_WIN)
 TEST_F(UDPSocketPerfTest, WriteNonBlocking) {
   base::PerfTimeLogger timer("UDP_socket_write_nonblocking");
   WriteBenchmark(true);
 }
-#endif
 
 }  // namespace