Standardize usage of virtual/override/final in remoting/

remoting/host/heartbeat_sender.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_HEARTBEAT_SENDER_H_
 #define REMOTING_HOST_HEARTBEAT_SENDER_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 80 matching lines @@
   };
 
   // |signal_strategy| and |delegate| must outlive this
   // object. Heartbeats will start when the supplied SignalStrategy
   // enters the CONNECTED state.
   HeartbeatSender(Listener* listener,
                   const std::string& host_id,
                   SignalStrategy* signal_strategy,
                   scoped_refptr<RsaKeyPair> key_pair,
                   const std::string& directory_bot_jid);
-  virtual ~HeartbeatSender();
+  ~HeartbeatSender() 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;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(HeartbeatSenderTest, DoSendStanza);
   FRIEND_TEST_ALL_PREFIXES(HeartbeatSenderTest,
                            DoSendStanzaWithExpectedSequenceId);
   FRIEND_TEST_ALL_PREFIXES(HeartbeatSenderTest, CreateHeartbeatMessage);
   FRIEND_TEST_ALL_PREFIXES(HeartbeatSenderTest, ProcessResponseSetInterval);
   FRIEND_TEST_ALL_PREFIXES(HeartbeatSenderTest,
                            ProcessResponseExpectedSequenceId);
 
@@ skipping 23 matching lines @@
   int sequence_id_recent_set_num_;
   bool heartbeat_succeeded_;
   int failed_startup_heartbeat_count_;
 
   DISALLOW_COPY_AND_ASSIGN(HeartbeatSender);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_HEARTBEAT_SENDER_H_