Standardize usage of virtual/override/final specifiers.

ui/views/widget/desktop_aura/desktop_focus_rules.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 UI_VIEWS_WIDGET_DESKTOP_FOCUS_RULES_H_
 #define UI_VIEWS_WIDGET_DESKTOP_FOCUS_RULES_H_
 
 #include "ui/wm/core/base_focus_rules.h"
 
 namespace views {
 
 class DesktopFocusRules : public wm::BaseFocusRules {
  public:
   explicit DesktopFocusRules(aura::Window* content_window);
-  virtual ~DesktopFocusRules();
+  ~DesktopFocusRules() override;
 
  private:
   // Overridden from wm::BaseFocusRules:
-  virtual bool CanActivateWindow(aura::Window* window) const override;
-  virtual bool SupportsChildActivation(aura::Window* window) const override;
-  virtual bool IsWindowConsideredVisibleForActivation(
+  bool CanActivateWindow(aura::Window* window) const override;
+  bool SupportsChildActivation(aura::Window* window) const override;
+  bool IsWindowConsideredVisibleForActivation(
       aura::Window* window) const override;
-  virtual aura::Window* GetToplevelWindow(aura::Window* window) const override;
-  virtual aura::Window* GetNextActivatableWindow(
-      aura::Window* window) const override;
+  aura::Window* GetToplevelWindow(aura::Window* window) const override;
+  aura::Window* GetNextActivatableWindow(aura::Window* window) const override;
 
   // The content window. This is an activatable window even though it is a
   // child.
   aura::Window* content_window_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopFocusRules);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_FOCUS_RULES_H_