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

core/modules/contact/contact.views.inc

@@ -0,0 +1,19 @@
+<?php
+
+/**
+ * @file
+ * Provide views data for contact.module.
+ */
+
+/**
+ * Implements hook_views_data_alter().
+ */
+function contact_views_data_alter(&$data) {
+  $data['users']['contact'] = array(
+    'field' => array(
+      'title' => t('Contact link'),
+      'help' => t('Provide a simple link to the user contact page.'),
+      'id' => 'contact_link',
+    ),
+  );
+}