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

chrome/browser/media_galleries/media_scan_manager.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_MEDIA_GALLERIES_MEDIA_SCAN_MANAGER_H_
 #define CHROME_BROWSER_MEDIA_GALLERIES_MEDIA_SCAN_MANAGER_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 16 matching lines @@
 class ExtensionRegistry;
 }
 
 // The MediaScanManager is owned by MediaFileSystemRegistry, which is global.
 // This class manages multiple 'virtual' media scans, up to one per extension
 // per profile, and also manages the one physical scan backing them.
 // This class lives and is called on the UI thread.
 class MediaScanManager : public extensions::ExtensionRegistryObserver {
  public:
   MediaScanManager();
-  virtual ~MediaScanManager();
+  ~MediaScanManager() override;
 
   // There can only be ever one observer registered per profile. Does not take
   // ownership of |observer|. An observer must be registered before scanning.
   void AddObserver(Profile* profile, MediaScanManagerObserver* observer);
   void RemoveObserver(Profile* profile);
 
   // Must be called when |profile| is shut down.
   void CancelScansForProfile(Profile* profile);
 
   // The results of the scan are reported to the registered
@@ skipping 21 matching lines @@
  private:
   struct ScanObservers {
     ScanObservers();
     ~ScanObservers();
     MediaScanManagerObserver* observer;
     std::set<std::string /*extension id*/> scanning_extensions;
   };
   typedef std::map<Profile*, ScanObservers> ScanObserverMap;
 
   // extensions::ExtensionRegistryObserver implementation.
-  virtual void OnExtensionUnloaded(
+  void OnExtensionUnloaded(
       content::BrowserContext* browser_context,
       const extensions::Extension* extension,
       extensions::UnloadedExtensionInfo::Reason reason) override;
 
   bool ScanInProgress() const;
 
   void OnScanCompleted(
       bool success,
       const MediaFolderFinder::MediaFolderFinderResults& found_folders);
 
@@ skipping 14 matching lines @@
   ScopedObserver<extensions::ExtensionRegistry,
                  extensions::ExtensionRegistryObserver>
       scoped_extension_registry_observer_;
 
   base::WeakPtrFactory<MediaScanManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaScanManager);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_GALLERIES_MEDIA_SCAN_MANAGER_H_