/usr/share/gtk-doc/html/ is in libebackend1.2-dev 3.2.3-0ubuntu7.1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gtk-doc/html/libebackend/
/usr/share/gtk-doc/html/libebackend/api-index-2.24.html
/usr/share/gtk-doc/html/libebackend/api-index-2.26.html
/usr/share/gtk-doc/html/libebackend/api-index-2.28.html
/usr/share/gtk-doc/html/libebackend/api-index-2.30.html
/usr/share/gtk-doc/html/libebackend/api-index-3.2.html
/usr/share/gtk-doc/html/libebackend/api-index-deprecated.html
/usr/share/gtk-doc/html/libebackend/ch01.html
/usr/share/gtk-doc/html/libebackend/home.png
/usr/share/gtk-doc/html/libebackend/index.html
/usr/share/gtk-doc/html/libebackend/index.sgml
/usr/share/gtk-doc/html/libebackend/ix01.html
/usr/share/gtk-doc/html/libebackend/left.png
/usr/share/gtk-doc/html/libebackend/libebackend-EFileCache.html
/usr/share/gtk-doc/html/libebackend/libebackend-EOfflineListener.html
/usr/share/gtk-doc/html/libebackend/libebackend-e-data-server-module.html
/usr/share/gtk-doc/html/libebackend/libebackend-e-db3-utils.html
/usr/share/gtk-doc/html/libebackend/libebackend-e-dbhash.html
/usr/share/gtk-doc/html/libebackend/libebackend-e-sqlite3-vfs.html
/usr/share/gtk-doc/html/libebackend/libebackend.devhelp2
/usr/share/gtk-doc/html/libebackend/right.png
/usr/share/gtk-doc/html/libebackend/style.css
/usr/share/gtk-doc/html/libebackend/up.png