replace NULL->nullptr in src/remoting.

remoting/signaling/jingle_info_request.cc

 // Copyright 2014 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/signaling/jingle_info_request.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/stl_util.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 40 matching lines @@
   std::string relay_token;
 
   if (!stanza) {
     LOG(WARNING) << "Jingle info request has timed out.";
     on_jingle_info_cb_.Run(relay_token, relay_hosts, stun_hosts);
     return;
   }
 
   const buzz::XmlElement* query =
       stanza->FirstNamed(buzz::QN_JINGLE_INFO_QUERY);
-  if (query == NULL) {
+  if (query == nullptr) {
     LOG(WARNING) << "No Jingle info found in Jingle Info query response."
                  << stanza->Str();
     on_jingle_info_cb_.Run(relay_token, relay_hosts, stun_hosts);
     return;
   }
 
   const buzz::XmlElement* stun = query->FirstNamed(buzz::QN_JINGLE_INFO_STUN);
   if (stun) {
     for (const buzz::XmlElement* server =
          stun->FirstNamed(buzz::QN_JINGLE_INFO_SERVER);
-         server != NULL;
+         server != nullptr;
          server = server->NextNamed(buzz::QN_JINGLE_INFO_SERVER)) {
       std::string host = server->Attr(buzz::QN_JINGLE_INFO_HOST);
       std::string port_str = server->Attr(buzz::QN_JINGLE_INFO_UDP);
       if (host != buzz::STR_EMPTY && port_str != buzz::STR_EMPTY) {
         int port;
         if (!base::StringToInt(port_str, &port)) {
           LOG(WARNING) << "Unable to parse port in stanza" << stanza->Str();
           continue;
         }
 
         stun_hosts.push_back(rtc::SocketAddress(host, port));
       }
     }
   }
 
   const buzz::XmlElement* relay = query->FirstNamed(buzz::QN_JINGLE_INFO_RELAY);
   if (relay) {
     relay_token = relay->TextNamed(buzz::QN_JINGLE_INFO_TOKEN);
     for (const buzz::XmlElement* server =
          relay->FirstNamed(buzz::QN_JINGLE_INFO_SERVER);
-         server != NULL;
+         server != nullptr;
          server = server->NextNamed(buzz::QN_JINGLE_INFO_SERVER)) {
       std::string host = server->Attr(buzz::QN_JINGLE_INFO_HOST);
       if (host != buzz::STR_EMPTY)
         relay_hosts.push_back(host);
     }
   }
 
   on_jingle_info_cb_.Run(relay_token, relay_hosts, stun_hosts);
 }
 
 }  // namespace remoting