Standardize usage of virtual/override/final in ui/

ui/base/touch/touch_editing_controller.h

 // Copyright (c) 2013 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_BASE_TOUCH_TOUCH_EDITING_CONTROLLER_H_
 #define UI_BASE_TOUCH_TOUCH_EDITING_CONTROLLER_H_
 
 #include "ui/base/models/simple_menu_model.h"
 #include "ui/gfx/point.h"
 #include "ui/gfx/rect.h"
@@ skipping 42 matching lines @@
   virtual bool DrawsHandles() = 0;
 
   // Tells the editable to open context menu.
   virtual void OpenContextMenu(const gfx::Point& anchor) = 0;
 
   // Tells the editable to end touch editing and destroy touch selection
   // controller it owns.
   virtual void DestroyTouchSelection() = 0;
 
  protected:
-  virtual ~TouchEditable() {}
+  ~TouchEditable() override {}
 };
 
 // This defines the callback interface for other code to be notified of changes
 // in the state of a TouchEditable.
 class UI_BASE_EXPORT TouchSelectionController {
  public:
   virtual ~TouchSelectionController() {}
 
   // Creates a TouchSelectionController. Caller owns the returned object.
   static TouchSelectionController* create(
@@ skipping 16 matching lines @@
 
   virtual TouchSelectionController* create(TouchEditable* client_view) = 0;
 
  protected:
   virtual ~TouchSelectionControllerFactory() {}
 };
 
 }  // namespace views
 
 #endif  // UI_BASE_TOUCH_TOUCH_EDITING_CONTROLLER_H_