Standardize usage of virtual/override/final in chrome/browser/

chrome/browser/services/gcm/fake_gcm_profile_service.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 CHROME_BROWSER_SERVICES_GCM_FAKE_GCM_PROFILE_SERVICE_H_
 #define CHROME_BROWSER_SERVICES_GCM_FAKE_GCM_PROFILE_SERVICE_H_
 
 #include <list>
 #include <vector>
 
 #include "chrome/browser/services/gcm/gcm_profile_service.h"
 #include "components/gcm_driver/gcm_driver.h"
 
 namespace content {
 class BrowserContext;
 }  // namespace content
 
 namespace gcm {
 
 // Acts as a bridge between GCM API and GCMClient layer for testing purposes.
 class FakeGCMProfileService : public GCMProfileService {
  public:
   // Helper function to be used with
   // KeyedService::SetTestingFactory().
   static KeyedService* Build(content::BrowserContext* context);
 
   explicit FakeGCMProfileService(Profile* profile);
-  virtual ~FakeGCMProfileService();
+  ~FakeGCMProfileService() override;
 
   void RegisterFinished(const std::string& app_id,
                         const std::vector<std::string>& sender_ids);
   void UnregisterFinished(const std::string& app_id);
   void SendFinished(const std::string& app_id,
                     const std::string& receiver_id,
                     const GCMClient::OutgoingMessage& message);
 
   void AddExpectedUnregisterResponse(GCMClient::Result result);
 
@@ skipping 26 matching lines @@
   std::list<GCMClient::Result> unregister_responses_;
   GCMClient::OutgoingMessage last_sent_message_;
   std::string last_receiver_id_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeGCMProfileService);
 };
 
 }  // namespace gcm
 
 #endif  // CHROME_BROWSER_SERVICES_GCM_FAKE_GCM_PROFILE_SERVICE_H_