Understanding nsSVGFilterInstance is a bit of a nightmare since it is so poorly documented. We should add comments documenting the declaration of nsSVGFilterInstance, its methods, and its members.
Created attachment 614747 [details] [diff] [review]
I also removed a few bits of dead code that I noticed in passing.
Thanks. Pushed https://hg.mozilla.org/integration/mozilla-inbound/rev/dc0b57deb507