/usr/share/gtk-doc/ is in libgnome-keyring-dev 3.12.0-1+b1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gtk-doc/html/
/usr/share/gtk-doc/html/gnome-keyring/
/usr/share/gtk-doc/html/gnome-keyring/annotation-glossary.html
/usr/share/gtk-doc/html/gnome-keyring/ch01.html
/usr/share/gtk-doc/html/gnome-keyring/gnome-keyring-Callbacks.html
/usr/share/gtk-doc/html/gnome-keyring/gnome-keyring-Daemon-Management-Functions.html
/usr/share/gtk-doc/html/gnome-keyring/gnome-keyring-Item-ACLs.html
/usr/share/gtk-doc/html/gnome-keyring/gnome-keyring-Item-Attributes.html
/usr/share/gtk-doc/html/gnome-keyring/gnome-keyring-Item-Information.html
/usr/share/gtk-doc/html/gnome-keyring/gnome-keyring-Keyring-Info.html
/usr/share/gtk-doc/html/gnome-keyring/gnome-keyring-Keyring-Items.html
/usr/share/gtk-doc/html/gnome-keyring/gnome-keyring-Keyrings.html
/usr/share/gtk-doc/html/gnome-keyring/gnome-keyring-Miscellaneous-Functions.html
/usr/share/gtk-doc/html/gnome-keyring/gnome-keyring-Network-Passwords.html
/usr/share/gtk-doc/html/gnome-keyring/gnome-keyring-Non-pageable-Memory.html
/usr/share/gtk-doc/html/gnome-keyring/gnome-keyring-Result-Codes.html
/usr/share/gtk-doc/html/gnome-keyring/gnome-keyring-Search-Functionality.html
/usr/share/gtk-doc/html/gnome-keyring/gnome-keyring-Simple-Password-Storage.html
/usr/share/gtk-doc/html/gnome-keyring/gnome-keyring.devhelp2
/usr/share/gtk-doc/html/gnome-keyring/home.png
/usr/share/gtk-doc/html/gnome-keyring/index.html
/usr/share/gtk-doc/html/gnome-keyring/index.sgml
/usr/share/gtk-doc/html/gnome-keyring/left-insensitive.png
/usr/share/gtk-doc/html/gnome-keyring/left.png
/usr/share/gtk-doc/html/gnome-keyring/right-insensitive.png
/usr/share/gtk-doc/html/gnome-keyring/right.png
/usr/share/gtk-doc/html/gnome-keyring/style.css
/usr/share/gtk-doc/html/gnome-keyring/up-insensitive.png
/usr/share/gtk-doc/html/gnome-keyring/up.png