acf-pro-as-dependency.php

 <?php
        if ( !function_exists( 'get_home_path' ) )
            require_once( dirname(__FILE__) . '/../../../wp-admin/includes/file.php' );

        add_action( 'admin_init', array(&$this, 'has_acf') );

    public function has_acf() {
        if ( is_admin() && current_user_can( 'activate_plugins' ) &&  !is_plugin_active( 'advanced-custom-fields-pro/acf.php' ) ) {
            add_action( 'admin_notices', array(&$this, 'acf_not_activated_notice') );

            deactivate_plugins( plugin_basename( __FILE__ ) ); 

            if ( isset( $_GET['activate'] ) ) {
                unset( $_GET['activate'] );
            }
        }
    }
  ?>