Standardize usage of virtual/override/final specifiers.

ui/app_list/views/contents_switcher_view.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 UI_APP_LIST_VIEWS_CONTENTS_SWITCHER_VIEW_H_
 #define UI_APP_LIST_VIEWS_CONTENTS_SWITCHER_VIEW_H_
 
 #include <map>
 
 #include "base/basictypes.h"
 #include "ui/app_list/pagination_model_observer.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/view.h"
 
 namespace app_list {
 
 class ContentsView;
 
 // A view that contains buttons to switch the displayed view in the given
 // ContentsView.
 class ContentsSwitcherView : public views::View,
                              public views::ButtonListener,
                              public PaginationModelObserver {
  public:
   explicit ContentsSwitcherView(ContentsView* contents_view);
-  virtual ~ContentsSwitcherView();
+  ~ContentsSwitcherView() override;
 
   ContentsView* contents_view() const { return contents_view_; }
 
   // Adds a switcher button using |resource_id| as the button's image, which
   // opens the page with index |page_index| in the ContentsView.
   void AddSwitcherButton(int resource_id, int page_index);
 
  private:
   // Overridden from views::ButtonListener:
-  virtual void ButtonPressed(views::Button* sender,
-                             const ui::Event& event) override;
+  void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
   // Overridden from PaginationModelObserver:
-  virtual void TotalPagesChanged() override;
-  virtual void SelectedPageChanged(int old_selected, int new_selected) override;
-  virtual void TransitionStarted() override;
-  virtual void TransitionChanged() override;
+  void TotalPagesChanged() override;
+  void SelectedPageChanged(int old_selected, int new_selected) override;
+  void TransitionStarted() override;
+  void TransitionChanged() override;
 
   ContentsView* contents_view_;  // Owned by views hierarchy.
 
   DISALLOW_COPY_AND_ASSIGN(ContentsSwitcherView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_CONTENTS_SWITCHER_VIEW_H_