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

chrome/browser/ui/cocoa/download/download_item_mac.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_UI_COCOA_DOWNLOAD_DOWNLOAD_ITEM_MAC_H_
 #define CHROME_BROWSER_UI_COCOA_DOWNLOAD_DOWNLOAD_ITEM_MAC_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/task/cancelable_task_tracker.h"
@@ skipping 11 matching lines @@
 // A class that bridges the visible mac download items to chromium's download
 // model. The owning object (DownloadItemController) must explicitly call
 // |LoadIcon| if it wants to display the icon associated with this download.
 
 class DownloadItemMac : content::DownloadItem::Observer {
  public:
   DownloadItemMac(content::DownloadItem* download,
                   DownloadItemController* controller);
 
   // Destructor.
-  virtual ~DownloadItemMac();
+  ~DownloadItemMac() override;
 
   // content::DownloadItem::Observer implementation
-  virtual void OnDownloadUpdated(content::DownloadItem* download) override;
-  virtual void OnDownloadOpened(content::DownloadItem* download) override;
-  virtual void OnDownloadDestroyed(content::DownloadItem* download) override;
+  void OnDownloadUpdated(content::DownloadItem* download) override;
+  void OnDownloadOpened(content::DownloadItem* download) override;
+  void OnDownloadDestroyed(content::DownloadItem* download) override;
 
   DownloadItemModel* download_model() { return &download_model_; }
 
   // Asynchronous icon loading support.
   void LoadIcon();
 
  private:
   // Callback for asynchronous icon loading.
   void OnExtractIconComplete(gfx::Image* icon_bitmap);
 
   // The download item model we represent.
   DownloadItemModel download_model_;
 
   // The objective-c controller object.
   DownloadItemController* item_controller_;  // weak, owns us.
 
   // For canceling an in progress icon request.
   base::CancelableTaskTracker cancelable_task_tracker_;
 
   // Stores the last known path where the file will be saved.
   base::FilePath lastFilePath_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadItemMac);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_DOWNLOAD_DOWNLOAD_ITEM_MAC_H_