Replace NULL with nullptr in all C++ files.

webrtc/examples/peerconnection/client/main.cc

 /*
  *  Copyright 2012 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 12 matching lines @@
   rtc::EnsureWinsockInit();
   rtc::Win32Thread w32_thread;
   rtc::ThreadManager::Instance()->SetCurrentThread(&w32_thread);
 
   rtc::WindowsCommandLineArguments win_args;
   int argc = win_args.argc();
   char **argv = win_args.argv();
 
   rtc::FlagList::SetFlagsFromCommandLine(&argc, argv, true);
   if (FLAG_help) {
-    rtc::FlagList::Print(NULL, false);
+    rtc::FlagList::Print(nullptr, false);
     return 0;
   }
 
   // Abort if the user specifies a port that is outside the allowed
   // range [1, 65535].
   if ((FLAG_port < 1) || (FLAG_port > 65535)) {
     printf("Error: %i is not a valid port.\n", FLAG_port);
     return -1;
   }
 
   MainWnd wnd(FLAG_server, FLAG_port, FLAG_autoconnect, FLAG_autocall);
   if (!wnd.Create()) {
     RTC_NOTREACHED();
     return -1;
   }
 
   rtc::InitializeSSL();
   PeerConnectionClient client;
   rtc::scoped_refptr<Conductor> conductor(
         new rtc::RefCountedObject<Conductor>(&client, &wnd));
 
   // Main loop.
   MSG msg;
   BOOL gm;
-  while ((gm = ::GetMessage(&msg, NULL, 0, 0)) != 0 && gm != -1) {
+  while ((gm = ::GetMessage(&msg, nullptr, 0, 0)) != 0 && gm != -1) {
     if (!wnd.PreTranslateMessage(&msg)) {
       ::TranslateMessage(&msg);
       ::DispatchMessage(&msg);
     }
   }
 
   if (conductor->connection_active() || client.is_connected()) {
     while ((conductor->connection_active() || client.is_connected()) &&
-           (gm = ::GetMessage(&msg, NULL, 0, 0)) != 0 && gm != -1) {
+           (gm = ::GetMessage(&msg, nullptr, 0, 0)) != 0 && gm != -1) {
       if (!wnd.PreTranslateMessage(&msg)) {
         ::TranslateMessage(&msg);
         ::DispatchMessage(&msg);
       }
     }
   }
 
   rtc::CleanupSSL();
   return 0;
 }