As in topic. API currently offers fixed ratio only for Mac but not for Windows
shell/browser/native_window_views.cc
widget()->CloseNow();
}
void NativeWindowViews::Focus(bool focus) {
  
  if (!IsVisible())
    return;
  if (focus) {
    widget()->Activate();
  } else {
    widget()->Deactivate();
  }
}
bool NativeWindowViews::IsFocused() {
  return widget()->IsActive();
}
void NativeWindowViews::Show() {
  if (is_modal() && NativeWindow::parent() &&
      !widget()->native_widget_private()->IsVisible())
    static_cast<NativeWindowViews*>(parent())->IncrementChildModals();
  widget()->native_widget_private()->Show(GetRestoredState(), gfx::Rect());
  
  widget()->Activate();
  NotifyWindowShow();
#if defined(USE_X11)
  if (!features::IsUsingOzonePlatform() && global_menu_bar_)
    global_menu_bar_->OnWindowMapped();
#endif
}
void NativeWindowViews::ShowInactive() {