Replace NULL with nullptr or null in webrtc/base/.

webrtc/base/firewallsocketserver.h

 /*
  *  Copyright 2004 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.
  */
 
 #ifndef WEBRTC_BASE_FIREWALLSOCKETSERVER_H_
 #define WEBRTC_BASE_FIREWALLSOCKETSERVER_H_
 
 #include <vector>
 #include "webrtc/base/socketserver.h"
 #include "webrtc/base/criticalsection.h"
 
 namespace rtc {
 
 class FirewallManager;
 
 // This SocketServer shim simulates a rule-based firewall server.
 
 enum FirewallProtocol { FP_UDP, FP_TCP, FP_ANY };
 enum FirewallDirection { FD_IN, FD_OUT, FD_ANY };
 
 class FirewallSocketServer : public SocketServer {
  public:
-  FirewallSocketServer(SocketServer * server,
-                       FirewallManager * manager = NULL,
+  FirewallSocketServer(SocketServer* server,
+                       FirewallManager* manager = nullptr,
                        bool should_delete_server = false);
   ~FirewallSocketServer() override;
 
   SocketServer* socketserver() const { return server_; }
   void set_socketserver(SocketServer* server) {
     if (server_ && should_delete_server_) {
       delete server_;
-      server_ = NULL;
+      server_ = nullptr;
       should_delete_server_ = false;
     }
     server_ = server;
   }
 
   // Settings to control whether CreateSocket or Socket::Listen succeed.
   void set_udp_sockets_enabled(bool enabled) { udp_sockets_enabled_ = enabled; }
   void set_tcp_sockets_enabled(bool enabled) { tcp_sockets_enabled_ = enabled; }
   bool tcp_listen_enabled() const { return tcp_listen_enabled_; }
   void set_tcp_listen_enabled(bool enabled) { tcp_listen_enabled_ = enabled; }
@@ skipping 56 matching lines @@
   void ClearRules();
 
  private:
   CriticalSection crit_;
   std::vector<FirewallSocketServer *> servers_;
 };
 
 }  // namespace rtc
 
 #endif  // WEBRTC_BASE_FIREWALLSOCKETSERVER_H_