/usr/share/doc/ubuntu-web/ is in qml-module-ubuntu-web-doc 0.23+16.04.20160413-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/ubuntu-web/html/
/usr/share/doc/ubuntu-web/html/images/
/usr/share/doc/ubuntu-web/html/images/used-in-examples/
/usr/share/doc/ubuntu-web/html/qml-ubuntu-web-sharedwebcontext-members.html
/usr/share/doc/ubuntu-web/html/qml-ubuntu-web-sharedwebcontext.html
/usr/share/doc/ubuntu-web/html/qml-ubuntu-web-webcontext-members.html
/usr/share/doc/ubuntu-web/html/qml-ubuntu-web-webcontext.html
/usr/share/doc/ubuntu-web/html/qml-ubuntu-web-webview-members.html
/usr/share/doc/ubuntu-web/html/qml-ubuntu-web-webview-obsolete.html
/usr/share/doc/ubuntu-web/html/qml-ubuntu-web-webview.html
/usr/share/doc/ubuntu-web/html/scripts/
/usr/share/doc/ubuntu-web/html/style/
/usr/share/doc/ubuntu-web/html/style/base.css
/usr/share/doc/ubuntu-web/html/style/custom.css
/usr/share/doc/ubuntu-web/html/style/qtquick.css
/usr/share/doc/ubuntu-web/html/ubuntu-web-qmlmodule.html
/usr/share/doc/ubuntu-web/html/ubuntuweb.index.gz