Subfolders not found for the Rebranding plugin

Howdy! I searched and searched, but couldn't find:

wp-includes/wordpress-admin-bar/themes/grey/images/background.png
wp-includes/wordpress-admin-bar/themes/grey/images/background-logo.png
wp-includes/wordpress-admin-bar/themes/grey/images/bullet_arrow_down.gif
and maybe wp-includes/wordpress-admin-bar/themes/grey/grey.css

There is no wordpress-admin-bar folder in the wp-includes folder. Perhaps that's because I don't have a plugin that adds it?