accessibility-8.x-1.x-dev/modules/accessibility_theming/accessibility_theming.module

<?php

/**
 * Implements hook_permission().
 */
function accessibility_theming_permission() {
  return array('access accessibility theming' => array(
    'title' => t('Access accessibility theming'),
    'description' => t('Users can run accessibility tests on the entire page.'))
  );
}

/**
 * Implements hook_init().
 */
function accessibility_theming_page_build(&$page) {
  if (!Drupal::currentUser()->hasPermission('access accessibility theming')) {
    return;
  }
  accessibility_load();
  drupal_add_js(drupal_get_path('module', 'accessibility_theming') . '/js/accessibility_theming.js');
  drupal_add_css(drupal_get_path('module', 'accessibility_theming') . '/css/accessibility_theming.css');
}