https://bugs.webkit.org/show_bug.cgi?id=87599

Reviewed by Darin Adler.

* heap/Heap.cpp:
(JSC::Heap::collect): Don't force immediate finalization -- it will
happen lazily.

* heap/MarkedBlock.cpp:
(JSC::MarkedBlock::sweep): Sweep a block's weak set when sweeping the
block. The weak set may not have been swept yet, and this is our last
chance to run weak finalizers before we recycle the memory they reference.

* heap/MarkedBlock.h:
* heap/MarkedSpace.cpp:
(JSC::MarkedBlock::sweepWeakSets):
* heap/MarkedSpace.h:
(JSC::MarkedSpace::sweepWeakSets): Nixed sweepWeakSets because it's unused
now.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@118646 268f45cc-cd09-0410-ab3c-d52691b4dbfc