replace NULL->nullptr in src/remoting.

remoting/protocol/client_control_dispatcher.cc

 // 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.
 
 #include "remoting/protocol/client_control_dispatcher.h"
 
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/callback_helpers.h"
 #include "base/message_loop/message_loop_proxy.h"
@@ skipping 42 matching lines @@
     return false;
   }
 
   return true;
 }
 
 }  // namespace
 
 ClientControlDispatcher::ClientControlDispatcher()
     : ChannelDispatcherBase(kControlChannelName),
-      client_stub_(NULL),
-      clipboard_stub_(NULL) {
+      client_stub_(nullptr),
+      clipboard_stub_(nullptr) {
 }
 
 ClientControlDispatcher::~ClientControlDispatcher() {
   writer_.Close();
 }
 
 void ClientControlDispatcher::OnInitialized() {
   // TODO(garykac): Set write failed callback.
   writer_.Init(channel(), BufferedSocketWriter::WriteFailedCallback());
   reader_.Init(channel(), base::Bind(
@@ skipping 64 matching lines @@
     client_stub_->SetPairingResponse(message->pairing_response());
   } else if (message->has_extension_message()) {
     client_stub_->DeliverHostMessage(message->extension_message());
   } else {
     LOG(WARNING) << "Unknown control message received.";
   }
 }
 
 }  // namespace protocol
 }  // namespace remoting