/usr/share/gtk-doc/html/ is in libcroco3-dev 0.6.11-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gtk-doc/html/libcroco/
/usr/share/gtk-doc/html/libcroco/ch01.html
/usr/share/gtk-doc/html/libcroco/home.png
/usr/share/gtk-doc/html/libcroco/index.html
/usr/share/gtk-doc/html/libcroco/left-insensitive.png
/usr/share/gtk-doc/html/libcroco/left.png
/usr/share/gtk-doc/html/libcroco/libcroco-cr-additional-sel.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-attr-sel.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-cascade.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-declaration.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-doc-handler.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-enc-handler.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-fonts.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-input.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-num.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-om-parser.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-parser.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-parsing-location.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-prop-list.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-pseudo.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-rgb.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-sel-eng.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-selector.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-simple-sel.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-statement.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-string.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-style.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-stylesheet.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-term.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-tknzr.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-token.html
/usr/share/gtk-doc/html/libcroco/libcroco-cr-utils.html
/usr/share/gtk-doc/html/libcroco/libcroco-libcroco-config.html
/usr/share/gtk-doc/html/libcroco/libcroco.devhelp2
/usr/share/gtk-doc/html/libcroco/right-insensitive.png
/usr/share/gtk-doc/html/libcroco/right.png
/usr/share/gtk-doc/html/libcroco/style.css
/usr/share/gtk-doc/html/libcroco/up-insensitive.png
/usr/share/gtk-doc/html/libcroco/up.png