replace NULL->nullptr in src/remoting.

remoting/host/setup/daemon_controller.cc

 // Copyright 2013 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/host/setup/daemon_controller.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/thread_task_runner_handle.h"
@@ skipping 110 matching lines @@
   base::Closure request = base::Bind(
       &DaemonController::DoGetUsageStatsConsent, this, wrapped_done);
   ServiceOrQueueRequest(request);
 }
 
 DaemonController::~DaemonController() {
   // Make sure |delegate_| is deleted on the background thread.
   delegate_task_runner_->DeleteSoon(FROM_HERE, delegate_.release());
 
   // Stop the thread.
-  delegate_task_runner_ = NULL;
+  delegate_task_runner_ = nullptr;
   caller_task_runner_->DeleteSoon(FROM_HERE, delegate_thread_.release());
 }
 
 void DaemonController::DoGetConfig(const GetConfigCallback& done) {
   DCHECK(delegate_task_runner_->BelongsToCurrentThread());
 
   scoped_ptr<base::DictionaryValue> config = delegate_->GetConfig();
   caller_task_runner_->PostTask(FROM_HERE,
                                 base::Bind(done, base::Passed(&config)));
 }
@@ skipping 106 matching lines @@
   if (!servicing_request)
     ServiceNextRequest();
 }
 
 void DaemonController::ServiceNextRequest() {
   if (!pending_requests_.empty())
     delegate_task_runner_->PostTask(FROM_HERE, pending_requests_.front());
 }
 
 }  // namespace remoting