* refactor: remove unnecessary downcast in MenuViews::PopupAt()
* refactor: pass a views::Widget as an arg to the ElectronDesktopWindowTreeHostLinux ctor
* refactor: pass a views::Widget as an arg to the ElectronDesktopNativeWidgetAura ctor
* refactor: pass a views::Widget as an arg to the ElectronDesktopWindowTreeHostWin ctor
* refactor: create desktop_window_tree_host_ in the ElectronDesktopNativeWidgetAura constructor
* fixup! refactor: create desktop_window_tree_host_ in the ElectronDesktopNativeWidgetAura constructor
fix: tyop