After uninstall, remove last item in Launcher folder

ui/app_list/views/app_list_folder_view.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_APP_LIST_VIEWS_APP_LIST_FOLDER_VIEW_H_
 #define UI_APP_LIST_VIEWS_APP_LIST_FOLDER_VIEW_H_
 
 #include <string>
 
 #include "ui/app_list/app_list_item_list_observer.h"
@@ skipping 21 matching lines @@
                           public AppListModelObserver,
                           public ui::ImplicitAnimationObserver,
                           public AppsGridViewFolderDelegate {
  public:
   AppListFolderView(AppsContainerView* container_view,
                     AppListModel* model,
                     AppListMainView* app_list_main_view);
   ~AppListFolderView() override;
 
   void SetAppListFolderItem(AppListFolderItem* folder);
+  AppListFolderItem* folder_item() { return folder_item_; }
 
   // Schedules an animation to show or hide the view.
   // If |show| is false, the view should be set to invisible after the
   // animation is done unless |hide_for_reparent| is true.
   void ScheduleShowHideAnimation(bool show, bool hide_for_reparent);
 
   // Gets icon image bounds of the item at |index|, relative to
   // AppListFolderView.
   gfx::Rect GetItemIconBoundsAt(int index);
 
@@ skipping 65 matching lines @@
   bool hide_for_reparent_;
 
   base::string16 accessible_name_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListFolderView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_APP_LIST_FOLDER_VIEW_H_