Add types to form variables.

Closes #3487623

src/Controller/MercuryEditorContentTranslationController.php

@@ -2,6 +2,7 @@
 
 namespace Drupal\mercury_editor\Controller;
 
+use Drupal\Component\Datetime\TimeInterface;
 use Drupal\Core\Language\LanguageInterface;
 use Drupal\Core\Routing\RouteMatchInterface;
 use Drupal\mercury_editor\MercuryEditorTempstore;
@@ -30,11 +31,22 @@ class MercuryEditorContentTranslationController extends ContentTranslationContro
    *   A content translation manager instance.
    * @param \Drupal\Core\Entity\EntityFieldManagerInterface $entity_field_manager
    *   The entity field manager service.
+   * @param \Drupal\Component\Datetime\TimeInterface $time
+   * *   The time service.
    * @param \Drupal\mercury_editor\MercuryEditorTempstore $tempstore
    *   The Mercury Editor tempstore service.
    */
-  public function __construct(ContentTranslationManagerInterface $manager, EntityFieldManagerInterface $entity_field_manager, MercuryEditorTempstore $tempstore) {
-    parent::__construct($manager, $entity_field_manager);
+  public function __construct(
+    ContentTranslationManagerInterface $manager,
+    EntityFieldManagerInterface $entity_field_manager,
+    TimeInterface $time,
+    MercuryEditorTempstore $tempstore
+  ) {
+    parent::__construct(
+      $manager,
+      $entity_field_manager,
+      $time
+    );
     $this->tempstore = $tempstore;
   }
 
@@ -45,6 +57,7 @@ class MercuryEditorContentTranslationController extends ContentTranslationContro
     return new static(
       $container->get('content_translation.manager'),
       $container->get('entity_field.manager'),
+      $container->get('datetime.time'),
       $container->get('mercury_editor.tempstore_repository')
     );
   }