Standardize usage of virtual/override/final specifiers.

ui/views/accessibility/ax_window_obj_wrapper.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_VIEWS_ACCESSIBILITY_AX_WINDOW_OBJ_WRAPPER_H_
 #define UI_VIEWS_ACCESSIBILITY_AX_WINDOW_OBJ_WRAPPER_H_
 
 #include "ui/aura/window_observer.h"
 #include "ui/views/accessibility/ax_aura_obj_wrapper.h"
 
 namespace aura {
 class Window;
 }  // namespace aura
 
 namespace views {
 
 // Describes a |Window| for use with other AX classes.
 class AXWindowObjWrapper : public AXAuraObjWrapper,
                            public aura::WindowObserver {
  public:
   explicit AXWindowObjWrapper(aura::Window* window);
-  virtual ~AXWindowObjWrapper();
+  ~AXWindowObjWrapper() override;
 
   // AXAuraObjWrapper overrides.
-  virtual AXAuraObjWrapper* GetParent() override;
-  virtual void GetChildren(
-      std::vector<AXAuraObjWrapper*>* out_children) override;
-  virtual void Serialize(ui::AXNodeData* out_node_data) override;
-  virtual int32 GetID() override;
+  AXAuraObjWrapper* GetParent() override;
+  void GetChildren(std::vector<AXAuraObjWrapper*>* out_children) override;
+  void Serialize(ui::AXNodeData* out_node_data) override;
+  int32 GetID() override;
 
   // WindowObserver overrides.
-  virtual void OnWindowDestroying(aura::Window* window) override;
+  void OnWindowDestroying(aura::Window* window) override;
 
  private:
   aura::Window* window_;
 
   DISALLOW_COPY_AND_ASSIGN(AXWindowObjWrapper);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_ACCESSIBILITY_AX_WINDOW_OBJ_WRAPPER_H_