Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

core/modules/automated_cron/src/EventSubscriber/AutomatedCron.php

@@ -0,0 +1,85 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\automated_cron\EventSubscriber\AutomatedCron.
+ */
+
+namespace Drupal\automated_cron\EventSubscriber;
+
+use Drupal\Core\Config\ConfigFactoryInterface;
+use Drupal\Core\CronInterface;
+use Drupal\Core\State\StateInterface;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\HttpKernel\Event\PostResponseEvent;
+use Symfony\Component\HttpKernel\KernelEvents;
+
+/**
+ * A subscriber running cron after a response is sent.
+ */
+class AutomatedCron implements EventSubscriberInterface {
+
+  /**
+   * The cron service.
+   *
+   * @var \Drupal\Core\CronInterface
+   */
+  protected $cron;
+
+  /**
+   * The cron configuration.
+   *
+   * @var \Drupal\Core\Config\Config
+   */
+  protected $config;
+
+  /**
+   * The state key value store.
+   *
+   * @var \Drupal\Core\State\StateInterface;
+   */
+  protected $state;
+
+  /**
+   * Constructs a new automated cron runner.
+   *
+   * @param \Drupal\Core\CronInterface $cron
+   *   The cron service.
+   * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
+   *   The config factory.
+   * @param \Drupal\Core\State\StateInterface $state
+   *   The state key-value store service.
+   */
+  public function __construct(CronInterface $cron, ConfigFactoryInterface $config_factory, StateInterface $state) {
+    $this->cron = $cron;
+    $this->config = $config_factory->get('automated_cron.settings');
+    $this->state = $state;
+  }
+
+  /**
+   * Run the automated cron if enabled.
+   *
+   * @param \Symfony\Component\HttpKernel\Event\PostResponseEvent $event
+   *   The Event to process.
+   */
+  public function onTerminate(PostResponseEvent $event) {
+    $interval = $this->config->get('interval');
+    if ($interval > 0) {
+      $cron_next = $this->state->get('system.cron_last', 0) + $interval;
+      if ((int) $event->getRequest()->server->get('REQUEST_TIME') > $cron_next) {
+        $this->cron->run();
+      }
+    }
+  }
+
+  /**
+   * Registers the methods in this class that should be listeners.
+   *
+   * @return array
+   *   An array of event listener definitions.
+   */
+  public static function getSubscribedEvents() {
+    return [KernelEvents::TERMINATE => [['onTerminate', 100]]];
+  }
+
+}