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

chrome/browser/download/download_service.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 CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SERVICE_H_
 #define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SERVICE_H_
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 10 matching lines @@
 }
 
 namespace extensions {
 class ExtensionDownloadsEventRouter;
 }
 
 // Owning class for ChromeDownloadManagerDelegate.
 class DownloadService : public KeyedService {
  public:
   explicit DownloadService(Profile* profile);
-  virtual ~DownloadService();
+  ~DownloadService() override;
 
   // Get the download manager delegate, creating it if it doesn't already exist.
   ChromeDownloadManagerDelegate* GetDownloadManagerDelegate();
 
   // Get the interface to the history system. Returns NULL if profile is
   // incognito or if the DownloadManager hasn't been created yet or if there is
   // no HistoryService for profile. Virtual for testing.
   virtual DownloadHistory* GetDownloadHistory();
 
 #if defined(ENABLE_EXTENSIONS)
@@ skipping 19 matching lines @@
   static void CancelAllDownloads();
 
   // Sets the DownloadManagerDelegate associated with this object and
   // its DownloadManager.  Takes ownership of |delegate|, and destroys
   // the previous delegate.  For testing.
   void SetDownloadManagerDelegateForTesting(
       scoped_ptr<ChromeDownloadManagerDelegate> delegate);
 
   // Will be called to release references on other services as part
   // of Profile shutdown.
-  virtual void Shutdown() override;
+  void Shutdown() override;
 
   // Returns false if at least one extension has disabled the shelf, true
   // otherwise.
   bool IsShelfEnabled();
 
  private:
   bool download_manager_created_;
   Profile* profile_;
 
   // ChromeDownloadManagerDelegate may be the target of callbacks from
@@ skipping 21 matching lines @@
   // should be a separate EDER for on-record and off-record managers.
   // There does not appear to be a separate ExtensionSystem for on-record and
   // off-record profiles, so ExtensionSystem cannot own the EDER.
   scoped_ptr<extensions::ExtensionDownloadsEventRouter> extension_event_router_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(DownloadService);
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SERVICE_H_