Standardize usage of virtual/override/final specifiers.

ui/views/mouse_watcher_view_host.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_MOUSE_WATCHER_VIEW_HOST_H_
 #define UI_VIEWS_MOUSE_WATCHER_VIEW_HOST_H_
 
 #include "ui/views/mouse_watcher.h"
 
 namespace views {
 
 class View;
 
 class VIEWS_EXPORT MouseWatcherViewHost : public MouseWatcherHost {
  public:
   // Creates a new MouseWatcherViewHost. |hot_zone_insets| is added to the
   // bounds of the view to determine the active zone. For example, if
   // |hot_zone_insets.bottom()| is 10, then the listener is not notified if
   // the y coordinate is between the origin of the view and height of the view
   // plus 10.
   MouseWatcherViewHost(View* view, const gfx::Insets& hot_zone_insets);
-  virtual ~MouseWatcherViewHost();
+  ~MouseWatcherViewHost() override;
 
   // MouseWatcherHost.
-  virtual bool Contains(const gfx::Point& screen_point,
-                        MouseEventType type) override;
+  bool Contains(const gfx::Point& screen_point, MouseEventType type) override;
 
  private:
   bool IsCursorInViewZone(const gfx::Point& screen_point);
   bool IsMouseOverWindow();
 
   // View we're listening for events over.
   View* view_;
   // Insets added to the bounds of the view.
   const gfx::Insets hot_zone_insets_;
 
   DISALLOW_COPY_AND_ASSIGN(MouseWatcherViewHost);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_MOUSE_WATCHER_VIEW_HOST_H_