/usr/share/gnome-shell/ is in gnome-shell-extensions-gpaste 3.18.3-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gnome-shell/extensions/
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/aboutItem.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/deleteButton.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/deleteItemPart.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/dummyHistoryItem.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/emptyHistoryItem.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/extension.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/indicator.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/item.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/metadata.json
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/prefs.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/searchItem.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/stateSwitch.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/statusIcon.js
/usr/share/gnome-shell/extensions/GPaste@gnome-shell-extensions.gnome.org/uiItem.js
/usr/share/gnome-shell/search-providers/
/usr/share/gnome-shell/search-providers/org.gnome.GPaste.search-provider.ini