/usr/share/gtk-doc/ is in libharfbuzz-doc 0.9.27-1ubuntu1.1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gtk-doc/html/
/usr/share/gtk-doc/html/harfbuzz/
/usr/share/gtk-doc/html/harfbuzz/annotation-glossary.html
/usr/share/gtk-doc/html/harfbuzz/api-index-full.html
/usr/share/gtk-doc/html/harfbuzz/ch01.html
/usr/share/gtk-doc/html/harfbuzz/deprecated-api-index.html
/usr/share/gtk-doc/html/harfbuzz/harfbuzz-hb-blob.html
/usr/share/gtk-doc/html/harfbuzz/harfbuzz-hb-buffer.html
/usr/share/gtk-doc/html/harfbuzz/harfbuzz-hb-common.html
/usr/share/gtk-doc/html/harfbuzz/harfbuzz-hb-coretext.html
/usr/share/gtk-doc/html/harfbuzz/harfbuzz-hb-deprecated.html
/usr/share/gtk-doc/html/harfbuzz/harfbuzz-hb-face.html
/usr/share/gtk-doc/html/harfbuzz/harfbuzz-hb-font.html
/usr/share/gtk-doc/html/harfbuzz/harfbuzz-hb-ft.html
/usr/share/gtk-doc/html/harfbuzz/harfbuzz-hb-glib.html
/usr/share/gtk-doc/html/harfbuzz/harfbuzz-hb-gobject.html
/usr/share/gtk-doc/html/harfbuzz/harfbuzz-hb-graphite2.html
/usr/share/gtk-doc/html/harfbuzz/harfbuzz-hb-icu.html
/usr/share/gtk-doc/html/harfbuzz/harfbuzz-hb-ot-layout.html
/usr/share/gtk-doc/html/harfbuzz/harfbuzz-hb-ot-tag.html
/usr/share/gtk-doc/html/harfbuzz/harfbuzz-hb-ot.html
/usr/share/gtk-doc/html/harfbuzz/harfbuzz-hb-set.html
/usr/share/gtk-doc/html/harfbuzz/harfbuzz-hb-shape-plan.html
/usr/share/gtk-doc/html/harfbuzz/harfbuzz-hb-shape.html
/usr/share/gtk-doc/html/harfbuzz/harfbuzz-hb-unicode.html
/usr/share/gtk-doc/html/harfbuzz/harfbuzz-hb-uniscribe.html
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/usr/share/gtk-doc/html/harfbuzz/harfbuzz.devhelp2
/usr/share/gtk-doc/html/harfbuzz/home.png
/usr/share/gtk-doc/html/harfbuzz/index.html
/usr/share/gtk-doc/html/harfbuzz/index.sgml
/usr/share/gtk-doc/html/harfbuzz/left-insensitive.png
/usr/share/gtk-doc/html/harfbuzz/left.png
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/usr/share/gtk-doc/html/harfbuzz/right-insensitive.png
/usr/share/gtk-doc/html/harfbuzz/right.png
/usr/share/gtk-doc/html/harfbuzz/style.css
/usr/share/gtk-doc/html/harfbuzz/up-insensitive.png
/usr/share/gtk-doc/html/harfbuzz/up.png