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

core/modules/system/src/CronController.php

@@ -0,0 +1,75 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\system\CronController.
+ */
+
+namespace Drupal\system;
+
+use Drupal\Core\Controller\ControllerBase;
+use Drupal\Core\CronInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\HttpFoundation\Response;
+
+/**
+ * Controller for Cron handling.
+ */
+class CronController extends ControllerBase {
+
+  /**
+   * The cron service.
+   *
+   * @var \Drupal\Core\CronInterface
+   */
+  protected $cron;
+
+  /**
+   * Constructs a CronController object.
+   *
+   * @param \Drupal\Core\CronInterface $cron
+   *   The cron service.
+   */
+  public function __construct(CronInterface $cron) {
+    $this->cron = $cron;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static($container->get('cron'));
+  }
+
+
+  /**
+   * Run Cron once.
+   *
+   * @return \Symfony\Component\HttpFoundation\Response
+   *   A Symfony response object.
+   */
+  public function run() {
+    $this->cron->run();
+
+    // HTTP 204 is "No content", meaning "I did what you asked and we're done."
+    return new Response('', 204);
+  }
+
+  /**
+   * Run cron manually.
+   *
+   * @return \Symfony\Component\HttpFoundation\RedirectResponse
+   *   A Symfony direct response object.
+   */
+  public function runManually() {
+    if ($this->cron->run()) {
+      drupal_set_message($this->t('Cron ran successfully.'));
+    }
+    else {
+      drupal_set_message($this->t('Cron run failed.'), 'error');
+    }
+
+    return $this->redirect('system.status');
+  }
+
+}