After uninstall, remove last item in Launcher folder

ui/app_list/views/apps_grid_view.h

Index: ui/app_list/views/apps_grid_view.h
diff --git a/ui/app_list/views/apps_grid_view.h b/ui/app_list/views/apps_grid_view.h
index d8e2ede49ef6a7ed77fedf31edf3f161a9fedcf3..84085f2f8ffca197a1a7e31c0279630b19591fe8 100644
--- a/ui/app_list/views/apps_grid_view.h
+++ b/ui/app_list/views/apps_grid_view.h
@@ -197,6 +197,12 @@ class APP_LIST_EXPORT AppsGridView : public views::View,
   // The grid view must be inside a folder view.
   void OnFolderItemRemoved();
 
+  // If there is only 1 item left in the source folder after reparenting an item
+  // from it, updates both data model and view_model_ for removing last item
+  // from the source folder and removes the source folder.
+  void RemoveLastItemFromReparentItemFolderIfNecessary(
+      const std::string& source_folder_id);
+
   // Return the view model for test purposes.
   const views::ViewModelT<AppListItemView>* view_model_for_test() const {
     return &view_model_;
@@ -354,12 +360,6 @@ class APP_LIST_EXPORT AppsGridView : public views::View,
   bool ReparentItemToAnotherFolder(AppListItemView* item_view,
                                    const Index& target);
 
-  // If there is only 1 item left in the source folder after reparenting an item
-  // from it, updates both data model and view_model_ for removing last item
-  // from the source folder and removes the source folder.
-  void RemoveLastItemFromReparentItemFolderIfNecessary(
-      const std::string& source_folder_id);
-
   // If user does not drop the re-parenting folder item to any valid target,
   // cancel the re-parenting action, let the item go back to its original
   // parent folder with UI animation.