replace NULL->nullptr in src/remoting.

remoting/protocol/session_config.h

 // Copyright (c) 2012 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_PROTOCOL_SESSION_CONFIG_H_
 #define REMOTING_PROTOCOL_SESSION_CONFIG_H_
 
 #include <list>
 #include <string>
 
@@ skipping 120 matching lines @@
 
   const std::list<ChannelConfig>& audio_configs() const {
     return audio_configs_;
   }
 
   std::list<ChannelConfig>* mutable_audio_configs() {
     return &audio_configs_;
   }
 
   // Selects session configuration that is supported by both participants.
-  // NULL is returned if such configuration doesn't exist. When selecting
+  // nullptr is returned if such configuration doesn't exist. When selecting
   // channel configuration priority is given to the configs listed first
   // in |client_config|.
   bool Select(const CandidateSessionConfig* client_config,
               SessionConfig* result);
 
   // Returns true if |config| is supported.
   bool IsSupported(const SessionConfig& config) const;
 
   // Extracts final protocol configuration. Must be used for the description
   // received in the session-accept stanza. If the selection is ambiguous
   // (e.g. there is more than one configuration for one of the channel)
-  // or undefined (e.g. no configurations for a channel) then NULL is returned.
+  // or undefined (e.g. no configurations for a channel) then nullptr is
+  // returned.
   bool GetFinalConfig(SessionConfig* result) const;
 
   scoped_ptr<CandidateSessionConfig> Clone() const;
 
   // Helpers for enabling/disabling specific features.
   void DisableAudioChannel();
   void EnableVideoCodec(ChannelConfig::Codec codec);
 
  private:
   CandidateSessionConfig();
@@ skipping 10 matching lines @@
   std::list<ChannelConfig> control_configs_;
   std::list<ChannelConfig> event_configs_;
   std::list<ChannelConfig> video_configs_;
   std::list<ChannelConfig> audio_configs_;
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_SESSION_CONFIG_H_