WillChangeVisibilityState  303 ash/shelf/shelf_tooltip_manager.cc void ShelfTooltipManager::WillChangeVisibilityState(
WillChangeVisibilityState  281 ash/shelf/shelf_widget.cc   virtual void WillChangeVisibilityState(
WillChangeVisibilityState  506 ash/wm/panels/panel_layout_manager.cc void PanelLayoutManager::WillChangeVisibilityState(