Jetpack::register_assets PHP Method

    public function register_assets()
    {
        if (!wp_script_is('spin', 'registered')) {
            wp_register_script('spin', plugins_url('_inc/spin.js', JETPACK__PLUGIN_FILE), false, '1.3');
        }
        if (!wp_script_is('jquery.spin', 'registered')) {
            wp_register_script('jquery.spin', plugins_url('_inc/jquery.spin.js', JETPACK__PLUGIN_FILE), array('jquery', 'spin'), '1.3');
        }
        if (!wp_script_is('jetpack-gallery-settings', 'registered')) {
            wp_register_script('jetpack-gallery-settings', plugins_url('_inc/gallery-settings.js', JETPACK__PLUGIN_FILE), array('media-views'), '20121225');
        }
        if (!wp_script_is('jetpack-twitter-timeline', 'registered')) {
            wp_register_script('jetpack-twitter-timeline', plugins_url('_inc/twitter-timeline.js', JETPACK__PLUGIN_FILE), array('jquery'), '4.0.0', true);
        }
        if (!wp_script_is('jetpack-facebook-embed', 'registered')) {
            wp_register_script('jetpack-facebook-embed', plugins_url('_inc/facebook-embed.js', __FILE__), array('jquery'), null, true);
            /** This filter is documented in modules/sharedaddy/sharing-sources.php */
            $fb_app_id = apply_filters('jetpack_sharing_facebook_app_id', '249643311490');
            if (!is_numeric($fb_app_id)) {
                $fb_app_id = '';
            }
            wp_localize_script('jetpack-facebook-embed', 'jpfbembed', array('appid' => $fb_app_id, 'locale' => $this->get_locale()));
        }
        /**
         * As jetpack_register_genericons is by default fired off a hook,
         * the hook may have already fired by this point.
         * So, let's just trigger it manually.
         */
        require_once JETPACK__PLUGIN_DIR . '_inc/genericons.php';
        jetpack_register_genericons();
        /**
         * Register the social logos
         */
        require_once JETPACK__PLUGIN_DIR . '_inc/social-logos.php';
        jetpack_register_social_logos();
        if (!wp_style_is('jetpack-icons', 'registered')) {
            wp_register_style('jetpack-icons', plugins_url('css/jetpack-icons.min.css', JETPACK__PLUGIN_FILE), false, JETPACK__VERSION);
        }
    }