replace NULL->nullptr in src/remoting.

remoting/host/ipc_util_win.cc

 // Copyright 2013 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 "remoting/host/ipc_util.h"
 
 #include "base/files/file.h"
 #include "base/logging.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/stringprintf.h"
@@ skipping 46 matching lines @@
                                 IPC::Channel::MODE_SERVER,
                                 listener,
                                 io_task_runner);
 
   // Convert the channel name to the pipe name.
   std::string pipe_name(kChromePipeNamePrefix);
   pipe_name.append(channel_name);
 
   SECURITY_ATTRIBUTES security_attributes = {0};
   security_attributes.nLength = sizeof(security_attributes);
-  security_attributes.lpSecurityDescriptor = NULL;
+  security_attributes.lpSecurityDescriptor = nullptr;
   security_attributes.bInheritHandle = TRUE;
 
   // Create the client end of the channel. This code should match the code in
   // IPC::Channel.
   base::File client(CreateFile(base::UTF8ToUTF16(pipe_name).c_str(),
                                GENERIC_READ | GENERIC_WRITE,
                                0,
                                &security_attributes,
                                OPEN_EXISTING,
                                SECURITY_SQOS_PRESENT | SECURITY_IDENTIFICATION |
                                    FILE_FLAG_OVERLAPPED,
-                               NULL));
+                               nullptr));
   if (!client.IsValid()) {
     PLOG(ERROR) << "Failed to connect to '" << pipe_name << "'";
     return false;
   }
 
   *client_out = client.Pass();
   *server_out = server.Pass();
   return true;
 }
 
@@ skipping 34 matching lines @@
     PLOG(ERROR)
         << "Failed to create the server end of the Chromoting IPC channel";
     return false;
   }
 
   *pipe_out = pipe.Pass();
   return true;
 }
 
 } // namespace remoting