/usr/share/sip/PyQt4/QtWebKit/ is in python-qt4-dev 4.11.4+dfsg-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/sip/PyQt4/QtWebKit/QtWebKitmod.sip
/usr/share/sip/PyQt4/QtWebKit/qgraphicswebview.sip
/usr/share/sip/PyQt4/QtWebKit/qwebdatabase.sip
/usr/share/sip/PyQt4/QtWebKit/qwebelement.sip
/usr/share/sip/PyQt4/QtWebKit/qwebframe.sip
/usr/share/sip/PyQt4/QtWebKit/qwebhistory.sip
/usr/share/sip/PyQt4/QtWebKit/qwebhistoryinterface.sip
/usr/share/sip/PyQt4/QtWebKit/qwebinspector.sip
/usr/share/sip/PyQt4/QtWebKit/qwebkitglobal.sip
/usr/share/sip/PyQt4/QtWebKit/qwebkitversion.sip
/usr/share/sip/PyQt4/QtWebKit/qwebpage.sip
/usr/share/sip/PyQt4/QtWebKit/qwebpluginfactory.sip
/usr/share/sip/PyQt4/QtWebKit/qwebsecurityorigin.sip
/usr/share/sip/PyQt4/QtWebKit/qwebsettings.sip
/usr/share/sip/PyQt4/QtWebKit/qwebview.sip