/usr/share/gtk-doc/ is in libdbus-glib-1-doc 0.98-1ubuntu1.1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gtk-doc/html/
/usr/share/gtk-doc/html/dbus-glib/
/usr/share/gtk-doc/html/dbus-glib/ch01.html
/usr/share/gtk-doc/html/dbus-glib/ch02.html
/usr/share/gtk-doc/html/dbus-glib/ch03.html
/usr/share/gtk-doc/html/dbus-glib/dbus-binding-tool.html
/usr/share/gtk-doc/html/dbus-glib/dbus-glib-DBus-GLib-low-level.html
/usr/share/gtk-doc/html/dbus-glib/dbus-glib-DBus-GObject-related-functions.html
/usr/share/gtk-doc/html/dbus-glib/dbus-glib-DBusGConnection.html
/usr/share/gtk-doc/html/dbus-glib/dbus-glib-DBusGError.html
/usr/share/gtk-doc/html/dbus-glib/dbus-glib-DBusGMessage.html
/usr/share/gtk-doc/html/dbus-glib/dbus-glib-DBusGMethod.html
/usr/share/gtk-doc/html/dbus-glib/dbus-glib-DBusGProxy.html
/usr/share/gtk-doc/html/dbus-glib/dbus-glib-Specializable-GType-System.html
/usr/share/gtk-doc/html/dbus-glib/dbus-glib.devhelp2
/usr/share/gtk-doc/html/dbus-glib/home.png
/usr/share/gtk-doc/html/dbus-glib/index.html
/usr/share/gtk-doc/html/dbus-glib/index.sgml
/usr/share/gtk-doc/html/dbus-glib/left.png
/usr/share/gtk-doc/html/dbus-glib/right.png
/usr/share/gtk-doc/html/dbus-glib/style.css
/usr/share/gtk-doc/html/dbus-glib/up.png