Remove the animation delay for showing the top level apps when user opens app list launcher.

ui/app_list/views/app_list_folder_view.cc

Index: ui/app_list/views/app_list_folder_view.cc
diff --git a/ui/app_list/views/app_list_folder_view.cc b/ui/app_list/views/app_list_folder_view.cc
index 78273ef6aff416cdbec839e955e6f9703fe02611..440f228923d9349c1b09f39dcecc7ea4a81aa575 100644
--- a/ui/app_list/views/app_list_folder_view.cc
+++ b/ui/app_list/views/app_list_folder_view.cc
@@ -268,6 +268,12 @@ void AppListFolderView::DispatchEndDragEventForReparent(
       EndDragFromReparentItemInRootLevel(events_forwarded_to_drag_drop_host);
 }
 
+
+void AppListFolderView::HideViewImmediately() {
+  SetVisible(false);
+  hide_for_reparent_ = false;
+}
+
 void AppListFolderView::NavigateBack(AppListFolderItem* item,
                                      const ui::Event& event_flags) {
   container_view_->ShowApps(item);