After uninstall, remove last item in Launcher folder

chrome/browser/ui/app_list/extension_app_model_builder.cc

Index: chrome/browser/ui/app_list/extension_app_model_builder.cc
diff --git a/chrome/browser/ui/app_list/extension_app_model_builder.cc b/chrome/browser/ui/app_list/extension_app_model_builder.cc
index 2bac8c768b06ffcbd1757b0fbf075344e84effd9..7384fcbc69a9d33978fb0f09c425cc218496e339 100644
--- a/chrome/browser/ui/app_list/extension_app_model_builder.cc
+++ b/chrome/browser/ui/app_list/extension_app_model_builder.cc
@@ -205,10 +205,10 @@ void ExtensionAppModelBuilder::OnExtensionUninstalled(
   if (service_) {
     DVLOG(2) << service_ << ": OnExtensionUninstalled: "
              << extension->id().substr(0, 8);
-    service_->RemoveItem(extension->id());
+    service_->RemoveUninstalledItem(extension->id());
     return;
   }
-  model_->DeleteItem(extension->id());
+  model_->DeleteUninstalledItem(extension->id());
 }
 
 void ExtensionAppModelBuilder::OnDisabledExtensionUpdated(