Standardize usage of virtual/override/final specifiers.

chrome/browser/ui/views/location_bar/open_pdf_in_reader_view.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_VIEWS_LOCATION_BAR_OPEN_PDF_IN_READER_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_OPEN_PDF_IN_READER_VIEW_H_
 
 #include "ui/views/controls/image_view.h"
 #include "ui/views/widget/widget_observer.h"
 
 class OpenPDFInReaderBubbleView;
 
 namespace content {
 class WebContents;
 }
 
 namespace pdf {
 class OpenPDFInReaderPromptClient;
 }
 
 // A Page Action image view for the "Open PDF in Reader" bubble.
 class OpenPDFInReaderView : public views::ImageView,
                             public views::WidgetObserver {
  public:
   OpenPDFInReaderView();
-  virtual ~OpenPDFInReaderView();
+  ~OpenPDFInReaderView() override;
 
   void Update(content::WebContents* web_contents);
 
  private:
   void ShowBubble();
 
   // views::ImageView:
-  virtual void GetAccessibleState(ui::AXViewState* state) override;
-  virtual bool OnMousePressed(const ui::MouseEvent& event) override;
-  virtual void OnMouseReleased(const ui::MouseEvent& event) override;
-  virtual bool OnKeyPressed(const ui::KeyEvent& event) override;
+  void GetAccessibleState(ui::AXViewState* state) override;
+  bool OnMousePressed(const ui::MouseEvent& event) override;
+  void OnMouseReleased(const ui::MouseEvent& event) override;
+  bool OnKeyPressed(const ui::KeyEvent& event) override;
 
   // views::WidgetObserver:
-  virtual void OnWidgetDestroying(views::Widget* widget) override;
+  void OnWidgetDestroying(views::Widget* widget) override;
 
   OpenPDFInReaderBubbleView* bubble_;
 
   // Weak pointer; owned by the PDFWebContentsHelper of the currently active
   // tab.
   pdf::OpenPDFInReaderPromptClient* model_;
 
   DISALLOW_COPY_AND_ASSIGN(OpenPDFInReaderView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_OPEN_PDF_IN_READER_VIEW_H_