/usr/share/desktop-directories/ is in gnome-menus 3.4.0-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/desktop-directories/ActionGames.directory
/usr/share/desktop-directories/AdventureGames.directory
/usr/share/desktop-directories/ArcadeGames.directory
/usr/share/desktop-directories/AudioVideo.directory
/usr/share/desktop-directories/BlocksGames.directory
/usr/share/desktop-directories/BoardGames.directory
/usr/share/desktop-directories/CardGames.directory
/usr/share/desktop-directories/Debian.directory
/usr/share/desktop-directories/Development.directory
/usr/share/desktop-directories/Education.directory
/usr/share/desktop-directories/Game.directory
/usr/share/desktop-directories/GnomeScience.directory
/usr/share/desktop-directories/Graphics.directory
/usr/share/desktop-directories/Hardware.directory
/usr/share/desktop-directories/KidsGames.directory
/usr/share/desktop-directories/LogicGames.directory
/usr/share/desktop-directories/Network.directory
/usr/share/desktop-directories/Office.directory
/usr/share/desktop-directories/Personal.directory
/usr/share/desktop-directories/RolePlayingGames.directory
/usr/share/desktop-directories/Settings-System.directory
/usr/share/desktop-directories/Settings.directory
/usr/share/desktop-directories/SimulationGames.directory
/usr/share/desktop-directories/SportsGames.directory
/usr/share/desktop-directories/StrategyGames.directory
/usr/share/desktop-directories/System-Tools.directory
/usr/share/desktop-directories/System.directory
/usr/share/desktop-directories/Utility-Accessibility.directory
/usr/share/desktop-directories/Utility.directory
/usr/share/desktop-directories/X-GNOME-Menu-Applications.directory
/usr/share/desktop-directories/X-GNOME-Other.directory