Update {virtual,override} to follow C++11 style in remoting.

remoting/host/host_event_logger_win.cc

Index: remoting/host/host_event_logger_win.cc
diff --git a/remoting/host/host_event_logger_win.cc b/remoting/host/host_event_logger_win.cc
index fa58b5247b954e926bf0584c9a002cc2e19501eb..d8b039fb6e64a04de26c523c87b6554e1f432f5c 100644
--- a/remoting/host/host_event_logger_win.cc
+++ b/remoting/host/host_event_logger_win.cc
@@ -27,19 +27,19 @@ class HostEventLoggerWin : public HostEventLogger, public HostStatusObserver {
   HostEventLoggerWin(base::WeakPtr<HostStatusMonitor> monitor,
                      const std::string& application_name);
 
-  virtual ~HostEventLoggerWin();
+  ~HostEventLoggerWin() override;
 
   // HostStatusObserver implementation.  These methods will be called from the
   // network thread.
-  virtual void OnClientAuthenticated(const std::string& jid) override;
-  virtual void OnClientDisconnected(const std::string& jid) override;
-  virtual void OnAccessDenied(const std::string& jid) override;
-  virtual void OnClientRouteChange(
+  void OnClientAuthenticated(const std::string& jid) override;
+  void OnClientDisconnected(const std::string& jid) override;
+  void OnAccessDenied(const std::string& jid) override;
+  void OnClientRouteChange(
       const std::string& jid,
       const std::string& channel_name,
       const protocol::TransportRoute& route) override;
-  virtual void OnStart(const std::string& xmpp_login) override;
-  virtual void OnShutdown() override;
+  void OnStart(const std::string& xmpp_login) override;
+  void OnShutdown() override;
 
  private:
   void LogString(WORD type, DWORD event_id, const std::string& string);