diff -u b/core/modules/taxonomy/lib/Drupal/taxonomy/TermFormController.php b/core/modules/taxonomy/lib/Drupal/taxonomy/TermFormController.php
--- b/core/modules/taxonomy/lib/Drupal/taxonomy/TermFormController.php
+++ b/core/modules/taxonomy/lib/Drupal/taxonomy/TermFormController.php
@@ -9,8 +9,6 @@
 
 use Drupal\Core\Entity\EntityFormControllerNG;
 use Drupal\Core\Language\Language;
-use Symfony\Component\DependencyInjection\ContainerInterface;
-use Symfony\Component\HttpFoundation\Request;
 
 /**
  * Base for controller for taxonomy term edit forms.
@@ -18,21 +16,6 @@
 class TermFormController extends EntityFormControllerNG {
 
   /**
-   * The current request.
-   *
-   * @var \Symfony\Component\HttpFoundation\Request
-   */
-  protected $request;
-
-  /**
-   * {@inheritdoc}
-   */
-  public function buildForm(array $form, array &$form_state, Request $request = NULL) {
-    $this->request = $request;
-    return parent::buildForm($form, $form_state);
-  }
-
-  /**
    * Overrides Drupal\Core\Entity\EntityFormController::form().
    */
   public function form(array $form, array &$form_state) {
@@ -216,7 +199,7 @@
    */
   public function delete(array $form, array &$form_state) {
     $destination = array();
-    if ($this->request->query->has('destination')) {
+    if ($this->getRequest()->query->has('destination')) {
       $destination = drupal_get_destination();
     }
     $form_state['redirect'] = array('taxonomy/term/' . $this->entity->id() . '/delete', array('query' => $destination));