Add Link to Widget Area in Toolbar

functions.php

<?php
//* Do NOT include the opening php tag

// Adds a Widget link to the Toolbar 
add_action( 'admin_bar_menu', 'toolbar_link_to_widget_page', 999 );
function toolbar_link_to_widget_page( $wp_admin_bar ) {
    $args = array(
        'id'    => 'my_widget_page',
        'title' => 'My Widgets',
        'href'  => '/wp-admin/widgets.php',
        'meta'  => array( 'class' => 'my-toolbar-widget-page' )
    );
    $wp_admin_bar->add_node( $args );
}

Original code posted had a trailing slash in the href url - now has been corrected. 5/8/2015