- fixed 3128383 - DOM nodes should always use the same JS object

        * khtml/ecma/kjs_binding.h:
        * khtml/ecma/kjs_binding.cpp:
        (ScriptInterpreter::ScriptInterpreter): Set auto-delete to true on
	document dictionary.
        (ScriptInterpreter::getDOMObjectForDocument): New function - gets
	DOM object from per-document dictionary.
        (ScriptInterpreter::putDOMObjectForDocument): New function - put
	DOM object into per-document dictionary.
        (ScriptInterpreter::deleteDOMObjectsForDocument): Clear all
	objects from specific per-document dictionary.
        (ScriptInterpreter::mark): Mark per-document objects.
	(ScriptInterpreter::forgetDOMObjectsForDocument): Clear objects
	for this document from all interpreters.
        * khtml/ecma/kjs_dom.h:
        * khtml/ecma/kjs_dom.cpp:
        (KJS::getDOMNode): Use per-document rather than general DOM object
	dictionary.
        * khtml/xml/dom_docimpl.cpp:
        (DocumentImpl::~DocumentImpl): Call forgetDOMObjectsForDocument.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@3070 268f45cc-cd09-0410-ab3c-d52691b4dbfc