replace NULL->nullptr in src/remoting.

remoting/signaling/iq_sender.h

 // 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.
 
 #ifndef REMOTING_SIGNALING_IQ_SENDER_H_
 #define REMOTING_SIGNALING_IQ_SENDER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 15 matching lines @@
 namespace remoting {
 
 class IqRequest;
 class SignalStrategy;
 
 // IqSender handles sending iq requests and routing of responses to
 // those requests.
 class IqSender : public SignalStrategy::Listener {
  public:
   // Callback that is called when an Iq response is received. Called
-  // with the |response| set to NULL in case of a timeout.
+  // with the |response| set to nullptr in case of a timeout.
   typedef base::Callback<void(IqRequest* request,
                               const buzz::XmlElement* response)> ReplyCallback;
 
   explicit IqSender(SignalStrategy* signal_strategy);
   ~IqSender() override;
 
   // Send an iq stanza. Returns an IqRequest object that represends
   // the request. |callback| is called when response to |stanza| is
   // received. Destroy the returned IqRequest to cancel the callback.
   // Caller must take ownership of the result. Result must be
@@ skipping 31 matching lines @@
 };
 
 // This call must only be used on the thread it was created on.
 class IqRequest : public  base::SupportsWeakPtr<IqRequest> {
  public:
   IqRequest(IqSender* sender, const IqSender::ReplyCallback& callback,
             const std::string& addressee);
   ~IqRequest();
 
   // Sets timeout for the request. When the timeout expires the
-  // callback is called with the |response| set to NULL.
+  // callback is called with the |response| set to nullptr.
   void SetTimeout(base::TimeDelta timeout);
 
  private:
   friend class IqSender;
 
   void CallCallback(const buzz::XmlElement* stanza);
   void OnTimeout();
 
   // Called by IqSender when a response is received.
   void OnResponse(const buzz::XmlElement* stanza);
 
   void DeliverResponse(scoped_ptr<buzz::XmlElement> stanza);
 
   IqSender* sender_;
   IqSender::ReplyCallback callback_;
   std::string addressee_;
 
   DISALLOW_COPY_AND_ASSIGN(IqRequest);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_SIGNALING_IQ_SENDER_H_