core/AbcParser.cpp: allow Function to be subclassed by builtin code. class Function is declared as "final" in AS3 and needs to stay that way, but it is desirable to allow built-in code to subclass Function. (r=lhansen)
core/AbcParser.cpp: allow Function to be subclassed by builtin code. class Function is declared as "final" in AS3 and needs to stay that way, but it is desirable to allow built-in code to subclass Function. (r=lhansen)

pfgenyun/tamarin-redux,pnkfelix/tamarin-redux,pfgenyun/tamarin-redux,pfgenyun/tamarin-redux,pnkfelix/tamarin-redux,pnkfelix/tamarin-redux,pnkfelix/tamarin-redux,pnkfelix/tamarin-redux,pfgenyun/tamarin-redux,pfgenyun/tamarin-redux,pnkfelix/tamarin-redux,pnkfelix/tamarin-redux,pfgenyun/tamarin-redux,pfgenyun/tamarin-redux,pfgenyun/tamarin-redux