Remove unnecessary assignment in transport_client_socket_unittest.cc.

net/socket/transport_client_socket_unittest.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/socket/tcp_client_socket.h"
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "net/base/address_list.h"
@@ skipping 85 matching lines @@
  private:
   scoped_refptr<TCPListenSocket> listen_sock_;
   scoped_refptr<TCPListenSocket> connected_sock_;
   bool close_server_socket_on_next_send_;
 };
 
 void TransportClientSocketTest::SetUp() {
   ::testing::TestWithParam<ClientSocketTestTypes>::SetUp();
 
   // Find a free port to listen on
-  scoped_refptr<TCPListenSocket> sock = NULL;
+  scoped_refptr<TCPListenSocket> sock;
   int port;
   // Range of ports to listen on.  Shouldn't need to try many.
   const int kMinPort = 10100;
   const int kMaxPort = 10200;
 #if defined(OS_WIN)
   EnsureWinsockInit();
 #endif
   for (port = kMinPort; port < kMaxPort; port++) {
     sock = TCPListenSocket::CreateAndListen("127.0.0.1", port, this);
     if (sock.get())
@@ skipping 322 matching lines @@
 
   // It's possible the read is blocked because it's already read all the data.
   // Close the server socket, so there will at least be a 0-byte read.
   CloseServerSocket();
 
   rv = callback.WaitForResult();
   EXPECT_GE(rv, 0);
 }
 
 }  // namespace net