Plugin_Upgrader_Skin::after

	public $plugin_network_active = false;

	/**
	 * Constructor.
	 *
	 * Sets up the plugin upgrader skin.
	 *
	 * @since 2.8.0
	 *
	 * @param array $args Optional. The plugin upgrader skin arguments to
	 *                    override default options. Default empty array.
	 */
	public function __construct( $args = array() ) {
		$defaults = array(
			'url'    => '',
			'plugin' => '',
			'nonce'  => '',
			'title'  => __( 'Update Plugin' ),
		);
		$args     = wp_parse_args( $args, $defaults );

		$this->plugin = $args['plugin'];

		$this->plugin_active         = is_plugin_active( $this->plugin );
		$this->plugin_network_active = is_plugin_active_for_network( $this->plugin );

		parent::__construct( $args );
	}

	/**
	 * Action to perform following a single plugin update.
	 *
	 * @since 2.8.0
	 */
	public function after() {
		$this->plugin = $this->upgrader->plugin_info();
		if ( ! empty( $this->plugin ) && ! is_wp_error( $this->result ) && $this->plugin_active ) {
			// Currently used only when JS is off for a single plugin update?
			printf(
				'<iframe title="%s" style="border:0;overflow:hidden" width="100%%" height="170" src="%s"></iframe>',
				esc_attr__( 'Update progress' ),
				wp_nonce_url( 'update.php?action=activate-plugin&networkwide=' . $this->plugin_network_active . '&plugin=' . urlencode( $this->plugin ), 'activate-plugin_' . $this->plugin )
			);
		}