Replace NULL with nullptr in all C++ files.

webrtc/examples/peerconnection/server/main.cc

 /*
  *  Copyright 2011 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 43 matching lines @@
   parser.SetUsageMessage(usage);
   parser.SetFlag("port", "8888");
   parser.SetFlag("help", "false");
   parser.ProcessFlags();
 
   if (parser.GetFlag("help") == "true") {
     parser.PrintUsageMessage();
     return 0;
   }
 
-  int port = strtol((parser.GetFlag("port")).c_str(), NULL, 10);
+  int port = strtol((parser.GetFlag("port")).c_str(), nullptr, 10);
 
   // Abort if the user specifies a port that is outside the allowed
   // range [1, 65535].
   if ((port < 1) || (port > 65535)) {
     printf("Error: %i is not a valid port.\n", port);
     return -1;
   }
 
   ListeningSocket listener;
   if (!listener.Create()) {
@@ skipping 13 matching lines @@
   while (!quit) {
     fd_set socket_set;
     FD_ZERO(&socket_set);
     if (listener.valid())
       FD_SET(listener.socket(), &socket_set);
 
     for (SocketArray::iterator i = sockets.begin(); i != sockets.end(); ++i)
       FD_SET((*i)->socket(), &socket_set);
 
     struct timeval timeout = { 10, 0 };
-    if (select(FD_SETSIZE, &socket_set, NULL, NULL, &timeout) == SOCKET_ERROR) {
+    if (select(FD_SETSIZE, &socket_set, nullptr, nullptr, &timeout) ==
+        SOCKET_ERROR) {
       printf("select failed\n");
       break;
     }
 
     for (SocketArray::iterator i = sockets.begin(); i != sockets.end(); ++i) {
       DataSocket* s = *i;
       bool socket_done = true;
       if (FD_ISSET(s->socket(), &socket_set)) {
         if (s->OnDataAvailable(&socket_done) && s->request_received()) {
           ChannelMember* member = clients.Lookup(s);
@@ skipping 62 matching lines @@
       }
     }
   }
 
   for (SocketArray::iterator i = sockets.begin(); i != sockets.end(); ++i)
     delete (*i);
   sockets.clear();
 
   return 0;
 }