https://bugs.webkit.org/show_bug.cgi?id=81244

Rubber stamped by Filip Pizlo.

Changed type and name of JSGlobalData::m_isInitializingObject to
ClassInfo* and m_initializingObjectClass.
Changed JSGlobalData::setInitializingObject to
JSGlobalData::setInitializingObjectClass.  This pointer can be used within 
the debugger to determine what type of object is being initialized.
        
* runtime/JSCell.h:
(JSC::JSCell::finishCreation):
(JSC::allocateCell):
* runtime/JSGlobalData.cpp:
(JSC::JSGlobalData::JSGlobalData):
* runtime/JSGlobalData.h:
(JSGlobalData):
(JSC::JSGlobalData::isInitializingObject):
(JSC::JSGlobalData::setInitializingObjectClass):
* runtime/Structure.h:
(JSC::JSCell::finishCreation):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@111013 268f45cc-cd09-0410-ab3c-d52691b4dbfc