replace NULL->nullptr in src/remoting.

remoting/host/win/worker_process_launcher.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/host/win/worker_process_launcher.h"
 
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/single_thread_task_runner.h"
 #include "base/time/time.h"
@@ skipping 43 matching lines @@
 WorkerProcessLauncher::WorkerProcessLauncher(
     scoped_ptr<WorkerProcessLauncher::Delegate> launcher_delegate,
     WorkerProcessIpcDelegate* ipc_handler)
     : ipc_handler_(ipc_handler),
       launcher_delegate_(launcher_delegate.Pass()),
       exit_code_(CONTROL_C_EXIT),
       ipc_enabled_(false),
       kill_process_timeout_(
           base::TimeDelta::FromSeconds(kKillProcessTimeoutSeconds)),
       launch_backoff_(&kDefaultBackoffPolicy) {
-  DCHECK(ipc_handler_ != NULL);
+  DCHECK(ipc_handler_ != nullptr);
 
   LaunchWorker();
 }
 
 WorkerProcessLauncher::~WorkerProcessLauncher() {
   DCHECK(CalledOnValidThread());
 
-  ipc_handler_ = NULL;
+  ipc_handler_ = nullptr;
   StopWorker();
 }
 
 void WorkerProcessLauncher::Crash(
     const tracked_objects::Location& location) {
   DCHECK(CalledOnValidThread());
 
   // Ask the worker process to crash voluntarily if it is still connected.
   if (ipc_enabled_) {
     Send(new ChromotingDaemonMsg_Crash(location.function_name(),
@@ skipping 176 matching lines @@
     ipc_handler_->OnPermanentError(exit_code_);
     return;
   }
 
   // Schedule the next attempt to launch the worker process.
   launch_timer_.Start(FROM_HERE, launch_backoff_.GetTimeUntilRelease(), this,
                       &WorkerProcessLauncher::LaunchWorker);
 }
 
 } // namespace remoting