One point of difference between the DoMarking fast path and other tracers is
handling the edge name. Passing this through to the concrete tracer and
handling it there removes this differemce.
Eventually we should be able to inline some of these these calls at which point
it should get optimsed away for tracers that ignore it.
Depends on D156559
Differential Revision: https://phabricator.services.mozilla.com/D156560
