Standardize usage of virtual/override/final in ui/

ui/events/event_target.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_EVENTS_EVENT_TARGET_H_
 #define UI_EVENTS_EVENT_TARGET_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 20 matching lines @@
     }
 
    private:
     DispatcherApi();
     EventTarget* target_;
 
     DISALLOW_COPY_AND_ASSIGN(DispatcherApi);
   };
 
   EventTarget();
-  virtual ~EventTarget();
+  ~EventTarget() override;
 
   virtual bool CanAcceptEvent(const Event& event) = 0;
 
   // Returns the parent EventTarget in the event-target tree.
   virtual EventTarget* GetParentTarget() = 0;
 
   // Returns an iterator an EventTargeter can use to iterate over the list of
   // child EventTargets.
   virtual scoped_ptr<EventTargetIterator> GetChildIterator() const = 0;
 
@@ skipping 26 matching lines @@
   bool IsPreTargetListEmpty() const;
 
   void set_target_handler(EventHandler* handler) {
     target_handler_ = handler;
   }
 
  protected:
   EventHandler* target_handler() { return target_handler_; }
 
   // Overridden from EventHandler:
-  virtual void OnEvent(Event* event) override;
-  virtual void OnKeyEvent(KeyEvent* event) override;
-  virtual void OnMouseEvent(MouseEvent* event) override;
-  virtual void OnScrollEvent(ScrollEvent* event) override;
-  virtual void OnTouchEvent(TouchEvent* event) override;
-  virtual void OnGestureEvent(GestureEvent* event) override;
+  void OnEvent(Event* event) override;
+  void OnKeyEvent(KeyEvent* event) override;
+  void OnMouseEvent(MouseEvent* event) override;
+  void OnScrollEvent(ScrollEvent* event) override;
+  void OnTouchEvent(TouchEvent* event) override;
+  void OnGestureEvent(GestureEvent* event) override;
 
  private:
   friend class EventDispatcher;
   friend class EventTargetTestApi;
 
   // Returns the list of handlers that should receive the event before the
   // target. The handlers from the outermost target are first in the list, and
   // the handlers on |this| are the last in the list.
   void GetPreTargetHandlers(EventHandlerList* list);
 
   // Returns the list of handlers that should receive the event after the
   // target. The handlers from the outermost target are last in the list, and
   // the handlers on |this| are the first in the list.
   void GetPostTargetHandlers(EventHandlerList* list);
 
   EventHandlerList pre_target_list_;
   EventHandlerList post_target_list_;
   EventHandler* target_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(EventTarget);
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_EVENT_TARGET_H_