replace NULL->nullptr in src/remoting.

remoting/host/win/worker_process_launcher.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_HOST_WIN_WORKER_PROCESS_LAUNCHER_H_
 #define REMOTING_HOST_WIN_WORKER_PROCESS_LAUNCHER_H_
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
@@ skipping 87 matching lines @@
   void OnChannelError();
 
  private:
   friend class WorkerProcessLauncherTest;
 
   // base::win::ObjectWatcher::Delegate implementation used to watch for
   // the worker process exiting.
   virtual void OnObjectSignaled(HANDLE object) override;
 
   // Returns true when the object is being destroyed.
-  bool stopping() const { return ipc_handler_ == NULL; }
+  bool stopping() const { return ipc_handler_ == nullptr; }
 
   // Attempts to launch the worker process. Schedules next launch attempt if
   // creation of the process fails.
   void LaunchWorker();
 
   // Called to record outcome of a launch attempt: success or failure.
   void RecordLaunchResult();
 
   // Called by the test to record a successful launch attempt.
   void RecordSuccessfulLaunchForTest();
@@ skipping 41 matching lines @@
 
   // The handle of the worker process, if launched.
   base::win::ScopedHandle worker_process_;
 
   DISALLOW_COPY_AND_ASSIGN(WorkerProcessLauncher);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_WIN_WORKER_PROCESS_LAUNCHER_H_