Standardize usage of virtual/override/final in remoting/

remoting/host/host_status_sender.h

 // 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.
 
 #ifndef REMOTING_HOST_STATUS_SENDER_H_
 #define REMOTING_HOST_STATUS_SENDER_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 41 matching lines @@
 
   enum HostStatus {
     OFFLINE = 0,
     ONLINE = 1
   };
 
   HostStatusSender(const std::string& host_id,
                    SignalStrategy* signal_strategy,
                    scoped_refptr<RsaKeyPair> key_pair,
                    const std::string& directory_bot_jid);
-  virtual ~HostStatusSender();
+  ~HostStatusSender() override;
 
   // SignalStrategy::Listener interface.
-  virtual void OnSignalStrategyStateChange(
-      SignalStrategy::State state) override;
-  virtual bool OnSignalStrategyIncomingStanza(
-      const buzz::XmlElement* stanza) override;
+  void OnSignalStrategyStateChange(SignalStrategy::State state) override;
+  bool OnSignalStrategyIncomingStanza(const buzz::XmlElement* stanza) override;
 
   // APIs for sending host status XMPP messages to the chromoting bot.
   // status: the reason (exit code) why the host is offline.
   void SendOnlineStatus();
   void SendOfflineStatus(HostExitCodes exit_code);
 
   inline static const char* HostStatusToString(HostStatus host_status) {
     return host_status_strings_[host_status];
   }
 
@@ skipping 17 matching lines @@
 
   // The string representation of the HostStatus values.
   static const char* const host_status_strings_[2];
 
   DISALLOW_COPY_AND_ASSIGN(HostStatusSender);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_STATUS_SENDER_H_