Issue #2009014 follow-up by StephaneQ: Replace one more theme() with...

Issue #2009014 follow-up by StephaneQ: Replace one more theme() with drupal_render() in file module.

core/modules/file/file.module

@@ -913,7 +913,11 @@ function file_save_upload($form_field_name, $validators = array(), $destination
     if (!empty($errors)) {
       $message = t('The specified file %name could not be uploaded.', array('%name' => $file->getFilename()));
       if (count($errors) > 1) {
-        $message .= theme('item_list', array('items' => $errors));
+        $item_list = array(
+          '#theme' => 'item_list',
+          '#items' => $errors,
+        );
+        $message .= drupal_render($item_list);
       }
       else {
         $message .= ' ' . array_pop($errors);

core/modules/system/system.routing.yml

@@ -220,3 +220,8 @@ system_plugin_autocomplete:
     _controller: 'Drupal\system\Controller\SystemController::autocomplete'
   requirements:
     _access_system_plugin_ui: 'TRUE'
+
+front:
+  pattern: '/'
+  requirements:
+    _access: 'TRUE'