https://bugs.webkit.org/show_bug.cgi?id=122656

Reviewed by Michael Saboff.

Separate out the intrinsics for key and values iteration
of arrays.

This requires moving moving array iteration into the iterator
instance, rather than the prototype, but this is essentially
unobservable so we'll live with it for now.

* jit/ThunkGenerators.cpp:
(JSC::arrayIteratorNextThunkGenerator):
(JSC::arrayIteratorNextKeyThunkGenerator):
(JSC::arrayIteratorNextValueThunkGenerator):
* jit/ThunkGenerators.h:
* runtime/ArrayIteratorPrototype.cpp:
(JSC::ArrayIteratorPrototype::finishCreation):
* runtime/Intrinsic.h:
* runtime/JSArrayIterator.cpp:
(JSC::JSArrayIterator::finishCreation):
(JSC::createIteratorResult):
(JSC::arrayIteratorNext):
(JSC::arrayIteratorNextKey):
(JSC::arrayIteratorNextValue):
(JSC::arrayIteratorNextGeneric):
* runtime/VM.cpp:
(JSC::thunkGeneratorForIntrinsic):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@157307 268f45cc-cd09-0410-ab3c-d52691b4dbfc