/usr/share/gtk-doc/ is in libepc-doc 0.4.4-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gtk-doc/html/
/usr/share/gtk-doc/html/libepc-1.0/
/usr/share/gtk-doc/html/libepc-1.0/EpcProtocol.html
/usr/share/gtk-doc/html/libepc-1.0/EpcServiceInfo.html
/usr/share/gtk-doc/html/libepc-1.0/consuming.html
/usr/share/gtk-doc/html/libepc-1.0/dns-sd-support.html
/usr/share/gtk-doc/html/libepc-1.0/home.png
/usr/share/gtk-doc/html/libepc-1.0/index.html
/usr/share/gtk-doc/html/libepc-1.0/index.sgml
/usr/share/gtk-doc/html/libepc-1.0/internal-api.html
/usr/share/gtk-doc/html/libepc-1.0/left.png
/usr/share/gtk-doc/html/libepc-1.0/libepc-1.0-EpcServiceType.html
/usr/share/gtk-doc/html/libepc-1.0/libepc-1.0-EpcShell.html
/usr/share/gtk-doc/html/libepc-1.0/libepc-1.0-EpcTls.html
/usr/share/gtk-doc/html/libepc-1.0/libepc-1.0-auth-context.html
/usr/share/gtk-doc/html/libepc-1.0/libepc-1.0-consumer.html
/usr/share/gtk-doc/html/libepc-1.0/libepc-1.0-contents.html
/usr/share/gtk-doc/html/libepc-1.0/libepc-1.0-dispatcher.html
/usr/share/gtk-doc/html/libepc-1.0/libepc-1.0-password-dialog.html
/usr/share/gtk-doc/html/libepc-1.0/libepc-1.0-progress-window.html
/usr/share/gtk-doc/html/libepc-1.0/libepc-1.0-publisher.html
/usr/share/gtk-doc/html/libepc-1.0/libepc-1.0-service-monitor.html
/usr/share/gtk-doc/html/libepc-1.0/libepc-1.0.devhelp2
/usr/share/gtk-doc/html/libepc-1.0/publishing.html
/usr/share/gtk-doc/html/libepc-1.0/right.png
/usr/share/gtk-doc/html/libepc-1.0/style.css
/usr/share/gtk-doc/html/libepc-1.0/up.png
/usr/share/gtk-doc/html/libepc-1.0/widgets.html