It is time.

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();
-
-  // MouseWatcherHost.
-  virtual 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_