After uninstall, remove last item in Launcher folder

ui/app_list/views/apps_grid_view.cc

 // Copyright (c) 2012 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.
 
 #include "ui/app_list/views/apps_grid_view.h"
 
 #include <algorithm>
 #include <set>
 #include <string>
 
@@ skipping 1912 matching lines @@
   bounds_animator_.AnimateViewTo(drag_view_, drag_view_->bounds());
   bounds_animator_.SetAnimationDelegate(
       drag_view_,
       scoped_ptr<gfx::AnimationDelegate>(
           new ItemRemoveAnimationDelegate(drag_view_)));
   UpdatePaging();
 
   return true;
 }
 
-// After moving the re-parenting item out of the folder, if there is only 1 item
-// left, remove the last item out of the folder, delete the folder and insert it
-// to the data model at the same position. Make the same change to view_model_
-// accordingly.
+// After uninstalling or moving the re-parenting item out of the folder, if
+// there is only 1 item left, remove the last item out of the folder, delete the
+// folder and insert it to the data model at the same position. Make the same
+// change to view_model_ accordingly.
 void AppsGridView::RemoveLastItemFromReparentItemFolderIfNecessary(
     const std::string& source_folder_id) {
   AppListFolderItem* source_folder =
       static_cast<AppListFolderItem*>(item_list_->FindItem(source_folder_id));
   if (!source_folder || source_folder->ChildItemCount() != 1u)
     return;
 
   // Delete view associated with the folder item to be removed.
   DeleteItemViewAtIndex(
       view_model_.GetIndexOfView(activated_folder_item_view()));
@@ skipping 230 matching lines @@
 
 void AppsGridView::SetAsFolderDroppingTarget(const Index& target_index,
                                              bool is_target_folder) {
   AppListItemView* target_view =
       GetViewDisplayedAtSlotOnCurrentPage(target_index.slot);
   if (target_view)
     target_view->SetAsAttemptedFolderTarget(is_target_folder);
 }
 
 }  // namespace app_list