Get rid of static data in nodes.cpp (well, at least of non-debug one).

        No measurable change on SunSpider.

        * kjs/InitializeThreading.cpp:
        (KJS::initializeThreadingOnce):
        * kjs/nodes.cpp:
        (KJS::newTrackedObjects):
        (KJS::trackedObjectExtraRefCounts):
        (KJS::initializeNodesThreading):
        (KJS::ParserRefCounted::ParserRefCounted):
        (KJS::ParserRefCounted::ref):
        (KJS::ParserRefCounted::deref):
        (KJS::ParserRefCounted::refcount):
        (KJS::ParserRefCounted::deleteNewObjects):
        * kjs/nodes.h:
        Made newTrackedObjects and trackedObjectExtraRefCounts per-thread.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@32822 268f45cc-cd09-0410-ab3c-d52691b4dbfc