Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/modules/user/src/RoleStorage.php

@@ -0,0 +1,33 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\user\RoleStorage.
+ */
+
+namespace Drupal\user;
+
+use Drupal\Core\Config\Entity\ConfigEntityStorage;
+
+/**
+ * Controller class for user roles.
+ */
+class RoleStorage extends ConfigEntityStorage implements RoleStorageInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function isPermissionInRoles($permission, array $rids) {
+    $has_permission = FALSE;
+    foreach ($this->loadMultiple($rids) as $role) {
+      /** @var \Drupal\user\RoleInterface $role */
+      if ($role->isAdmin() || $role->hasPermission($permission)) {
+        $has_permission = TRUE;
+        break;
+      }
+    }
+
+    return $has_permission;
+  }
+
+}