Standardize usage of virtual/override/final specifiers.

ui/views/controls/menu/menu_message_loop_aura.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_CONTROLS_MENU_MENU_MESSAGE_LOOP_AURA_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_MESSAGE_LOOP_AURA_H_
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/views/controls/menu/menu_message_loop.h"
 
 namespace base {
 class MessagePumpDispatcher;
 }
 
 namespace ui {
 class ScopedEventDispatcher;
 }
 
 namespace views {
 
 class MenuMessageLoopAura : public MenuMessageLoop {
  public:
   MenuMessageLoopAura();
-  virtual ~MenuMessageLoopAura();
+  ~MenuMessageLoopAura() override;
 
   // Overridden from MenuMessageLoop:
-  virtual void Run(MenuController* controller,
-                   Widget* owner,
-                   bool nested_menu) override;
-  virtual bool ShouldQuitNow() const override;
-  virtual void QuitNow() override;
-  virtual void RepostEventToWindow(const ui::LocatedEvent& event,
-                                   gfx::NativeWindow window,
-                                   const gfx::Point& screen_loc) override;
-  virtual void ClearOwner() override;
+  void Run(MenuController* controller,
+           Widget* owner,
+           bool nested_menu) override;
+  bool ShouldQuitNow() const override;
+  void QuitNow() override;
+  void RepostEventToWindow(const ui::LocatedEvent& event,
+                           gfx::NativeWindow window,
+                           const gfx::Point& screen_loc) override;
+  void ClearOwner() override;
 
  private:
   // Owner of child windows.
   // WARNING: this may be NULL.
   Widget* owner_;
 
   scoped_ptr<ui::ScopedEventDispatcher> nested_dispatcher_;
   base::Closure message_loop_quit_;
 
   DISALLOW_COPY_AND_ASSIGN(MenuMessageLoopAura);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_MENU_MENU_MESSAGE_LOOP_AURA_H_