Update {virtual,override,final} to follow C++11 style in extensions, round 2.

extensions/browser/api/vpn_provider/vpn_service.cc

 // Copyright 2014 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.
 
 #include "extensions/browser/api/vpn_provider/vpn_service.h"
 
 #include <stdint.h>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 41 matching lines @@
 }
 
 }  // namespace
 
 class VpnService::VpnConfiguration : public ShillThirdPartyVpnObserver {
  public:
   VpnConfiguration(const std::string& extension_id,
                    const std::string& configuration_name,
                    const std::string& key,
                    base::WeakPtr<VpnService> vpn_service);
-  ~VpnConfiguration();
+  ~VpnConfiguration() override;
 
   const std::string& extension_id() const { return extension_id_; }
   const std::string& configuration_name() const { return configuration_name_; }
   const std::string& key() const { return key_; }
   const std::string& service_path() const { return service_path_; }
   void set_service_path(const std::string& service_path) {
     service_path_ = service_path;
   }
   const std::string& object_path() const { return object_path_; }
 
@@ skipping 412 matching lines @@
   delete configuration;
 }
 
 bool VpnService::DoesActiveConfigurationExistAndIsAccessAuthorized(
     const std::string& extension_id) {
   return active_configuration_ &&
          active_configuration_->extension_id() == extension_id;
 }
 
 }  // namespace chromeos