It is time.

ui/views/controls/menu/menu_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_CONTROLS_MENU_MENU_HOST_H_
-#define UI_VIEWS_CONTROLS_MENU_MENU_HOST_H_
-
-#include "base/compiler_specific.h"
-#include "ui/gfx/rect.h"
-#include "ui/views/widget/widget.h"
-
-namespace views {
-
-class NativeWidget;
-class SubmenuView;
-class View;
-class Widget;
-
-// SubmenuView uses a MenuHost to house the SubmenuView.
-//
-// SubmenuView owns the MenuHost. When SubmenuView is done with the MenuHost
-// |DestroyMenuHost| is invoked. The one exception to this is if the native
-// OS destroys the widget out from under us, in which case |MenuHostDestroyed|
-// is invoked back on the SubmenuView and the SubmenuView then drops references
-// to the MenuHost.
-class MenuHost : public Widget {
- public:
-  explicit MenuHost(SubmenuView* submenu);
-  virtual ~MenuHost();
-
-  // Initializes and shows the MenuHost.
-  // WARNING: |parent| may be NULL.
-  void InitMenuHost(Widget* parent,
-                    const gfx::Rect& bounds,
-                    View* contents_view,
-                    bool do_capture);
-
-  // Returns true if the menu host is visible.
-  bool IsMenuHostVisible();
-
-  // Shows the menu host. If |do_capture| is true the menu host should do a
-  // mouse grab.
-  void ShowMenuHost(bool do_capture);
-
-  // Hides the menu host.
-  void HideMenuHost();
-
-  // Destroys and deletes the menu host.
-  void DestroyMenuHost();
-
-  // Sets the bounds of the menu host.
-  void SetMenuHostBounds(const gfx::Rect& bounds);
-
-  // Releases a mouse grab installed by |ShowMenuHost|.
-  void ReleaseMenuHostCapture();
-
- private:
-  // Overridden from Widget:
-  virtual internal::RootView* CreateRootView() override;
-  virtual void OnMouseCaptureLost() override;
-  virtual void OnNativeWidgetDestroyed() override;
-  virtual void OnOwnerClosing() override;
-  virtual void OnDragWillStart() override;
-  virtual void OnDragComplete() override;
-
-  // The view we contain.
-  SubmenuView* submenu_;
-
-  // If true, DestroyMenuHost has been invoked.
-  bool destroying_;
-
-  // If true and capture is lost we don't notify the delegate.
-  bool ignore_capture_lost_;
-
-  DISALLOW_COPY_AND_ASSIGN(MenuHost);
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_CONTROLS_MENU_MENU_HOST_H_