Standardize usage of virtual/override/final specifiers.

ash/shell/panel_window.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 ASH_SHELL_PANEL_WINDOW_H_
 #define ASH_SHELL_PANEL_WINDOW_H_
 
 #include "base/basictypes.h"
 #include "ui/aura/aura_export.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_delegate.h"
 
 namespace ash {
 
 class PanelFrameView;
 
 // Example Class for panel windows (Widget::InitParams::TYPE_PANEL).
 // Instances of PanelWindow will get added to the PanelContainer top level
 // window which manages the panel layout through PanelLayoutManager.
 class PanelWindow : public views::WidgetDelegateView {
  public:
   explicit PanelWindow(const std::string& name);
-  virtual ~PanelWindow();
+  ~PanelWindow() override;
 
   // Creates the widget for the panel window using |params_|.
   views::Widget* CreateWidget();
 
   const std::string& name() { return name_; }
   views::Widget::InitParams& params() { return params_; }
 
   // Creates a panel window and returns the associated widget.
   static views::Widget* CreatePanelWindow(const gfx::Rect& rect);
 
  private:
   // Overridden from views::View:
-  virtual gfx::Size GetPreferredSize() const override;
-  virtual void OnPaint(gfx::Canvas* canvas) override;
+  gfx::Size GetPreferredSize() const override;
+  void OnPaint(gfx::Canvas* canvas) override;
 
   // Overridden from views::WidgetDelegate:
-  virtual base::string16 GetWindowTitle() const override;
-  virtual View* GetContentsView() override;
-  virtual bool CanResize() const override;
-  virtual bool CanMaximize() const override;
-  virtual bool CanMinimize() const override;
-  virtual views::NonClientFrameView* CreateNonClientFrameView(
+  base::string16 GetWindowTitle() const override;
+  View* GetContentsView() override;
+  bool CanResize() const override;
+  bool CanMaximize() const override;
+  bool CanMinimize() const override;
+  views::NonClientFrameView* CreateNonClientFrameView(
       views::Widget* widget) override;
 
   std::string name_;
   views::Widget::InitParams params_;
 
   DISALLOW_COPY_AND_ASSIGN(PanelWindow);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_PANEL_WINDOW_H_