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

core/modules/tracker/src/Controller/TrackerUserRecent.php

@@ -0,0 +1,25 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\tracker\Controller\TrackerUserRecent.
+ */
+
+namespace Drupal\tracker\Controller;
+
+use Drupal\Core\Controller\ControllerBase;
+use Drupal\user\UserInterface;
+
+/**
+ * Controller for tracker.users_recent_content route.
+ */
+class TrackerUserRecent extends ControllerBase {
+
+  /**
+   * Content callback for the tracker.users_recent_content route.
+   */
+  public function getContent(UserInterface $user) {
+    module_load_include('inc', 'tracker', 'tracker.pages');
+    return tracker_page($user);
+  }
+}