Change the order from comment count to views in Popular Posts widget

Hi. My theme came with a plugin to show the popular posts on the sidebar. However, the popular posts order is based on comments count, and i want to change it to views count. I don’t know exactly what to change in the code, but this is the part that shows how it’s ordered:

public function widget($args, $instance)
{
    extract($args);
    extract($instance);

    global $post;
    $args = array(
        'numberposts' => $number,
        'orderby' => 'comment_count'

I use Jetpack to count my views, and I want the widget to count those views, but I have no idea how to do that. I would really appreaciate any kind of help on this. Thanks!