LookupNameNoGC, LookupNameWithGlobalDefault, LookupNameUnqualified, as well as DefFunOperation and DefVarOrConstOperation use LookupProperty. I am not sure what kind of possible behaviors those functions have, i.e. only native objects? (probably no, because of DebugScopes?). It would be helpful if somebody pointed out the spec for those as well.

This is the last blocker to removing lookupProperty! I looked into this for a bit, but mapping ES6 references onto our LookupName/Fetch infrastructure is not necessarily obvious. Hopefully somebody comes along and fixes those, especially as we are not strictly ES6 compliant.