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

chrome/browser/services/gcm/push_messaging_service_impl.h

 // 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.
 
 #ifndef CHROME_BROWSER_SERVICES_GCM_PUSH_MESSAGING_SERVICE_IMPL_H_
 #define CHROME_BROWSER_SERVICES_GCM_PUSH_MESSAGING_SERVICE_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
 #include "components/gcm_driver/gcm_app_handler.h"
@@ skipping 16 matching lines @@
                                  public GCMAppHandler {
  public:
   // Register profile-specific prefs for GCM.
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
 
   // If any Service Workers are using push, starts GCM and adds an app handler.
   static void InitializeForProfile(Profile* profile);
 
   PushMessagingServiceImpl(GCMProfileService* gcm_profile_service,
                            Profile* profile);
-  virtual ~PushMessagingServiceImpl();
+  ~PushMessagingServiceImpl() override;
 
   // GCMAppHandler implementation.
-  virtual void ShutdownHandler() override;
-  virtual void OnMessage(const std::string& app_id,
-                         const GCMClient::IncomingMessage& message) override;
-  virtual void OnMessagesDeleted(const std::string& app_id) override;
-  virtual void OnSendError(
+  void ShutdownHandler() override;
+  void OnMessage(const std::string& app_id,
+                 const GCMClient::IncomingMessage& message) override;
+  void OnMessagesDeleted(const std::string& app_id) override;
+  void OnSendError(
       const std::string& app_id,
       const GCMClient::SendErrorDetails& send_error_details) override;
-  virtual void OnSendAcknowledged(const std::string& app_id,
-                                  const std::string& message_id) override;
-  virtual bool CanHandle(const std::string& app_id) const override;
+  void OnSendAcknowledged(const std::string& app_id,
+                          const std::string& message_id) override;
+  bool CanHandle(const std::string& app_id) const override;
 
   // content::PushMessagingService implementation:
-  virtual void Register(
+  void Register(
       const GURL& origin,
       int64 service_worker_registration_id,
       const std::string& sender_id,
       int renderer_id,
       int render_frame_id,
       bool user_gesture,
       const content::PushMessagingService::RegisterCallback& callback) override;
 
  private:
   void DeliverMessageCallback(const PushMessagingApplicationId& application_id,
@@ skipping 21 matching lines @@
   Profile* profile_;  // It owns our owner.
 
   base::WeakPtrFactory<PushMessagingServiceImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PushMessagingServiceImpl);
 };
 
 }  // namespace gcm
 
 #endif  // CHROME_BROWSER_SERVICES_GCM_PUSH_MESSAGING_SERVICE_IMPL_H_