Standardize usage of virtual/override/final in remoting/

remoting/host/fake_host_status_monitor.h

 // Copyright (c) 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.
 
 #ifndef REMOTING_HOST_FAKE_HOST_STATUS_MONITOR_H_
 #define REMOTING_HOST_FAKE_HOST_STATUS_MONITOR_H_
 
 #include "base/memory/weak_ptr.h"
 #include "remoting/host/host_status_monitor.h"
 
 namespace remoting {
 
 // An implementation of HostStatusMonitor that does nothing.
 class FakeHostStatusMonitor
     : public base::SupportsWeakPtr<FakeHostStatusMonitor>,
       public HostStatusMonitor {
  public:
-  virtual ~FakeHostStatusMonitor() {}
+  ~FakeHostStatusMonitor() override {}
 
   // HostStatusMonitor interface.
-  virtual void AddStatusObserver(HostStatusObserver* observer) override {}
-  virtual void RemoveStatusObserver(HostStatusObserver* observer) override {}
+  void AddStatusObserver(HostStatusObserver* observer) override {}
+  void RemoveStatusObserver(HostStatusObserver* observer) override {}
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_FAKE_HOST_STATUS_MONITOR_H_