2008-07-08  Geoffrey Garen  <ggaren@apple.com>

        Reviewed by Oliver Hunt.
        
        Added support for checking if an object has custom properties in its
        property map. WebCore uses this to optimize marking DOM wrappers.

WebCore:

2008-07-08  Geoffrey Garen  <ggaren@apple.com>

        Reviewed by Oliver Hunt.
        
        Only artificially mark JS DOM wrappers if they have custom properties.
        
        21X speedup on http://nerget.com/jstests/dom-mandelbrot.html.
        
        No, that is not a typo.

        * bindings/js/JSDOMBinding.cpp:
        (WebCore::ScriptInterpreter::markDOMNodesForDocument):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@35068 268f45cc-cd09-0410-ab3c-d52691b4dbfc