Note that there is unofficial package already: http://repo.paretje.be/unstable/#
See packages libqt5webkit5, libqt5webkit5-dev Git repo of package is at https://gitlab.com/paretje/qtwebkit/tree/master/debian Package is loosely based of webkitgtk's, and contains a few build dependencies that are not actually needed: libharfbuzz-dev, libfreetype6-dev, libfontconfig1-dev (these are used when qtbase is built, not directly in qtwebkit) libgnutls28-dev, libsoup2.4-dev, libenchant-dev, geoclue-2.0, libsecret-1-dev - not used at all libxt-dev - probably unused as well Otherwise, packaging files look good to me -- Regards, Konstantin