Merge 80842 - 2011-03-11 Anton Muhin <antonm@chromium.org>...

Merge 80842 - 2011-03-11  Anton Muhin  <antonm@chromium.org>;

        Reviewed by Adam Barth.

        [v8] Change the way group id for CSS objects is calculated
        https://bugs.webkit.org/show_bug.cgi?id=56117

        Do not treat CSSStyleDeclarations under not CSSRule as belonging to the same object group
        as they should not be reachable in JavaScript.

        Covered by existing layout tests.  Fact of absence of retention is not trivial to prove.

        * bindings/v8/V8GCController.cpp:
        (WebCore::calculateGroupId):
        (WebCore::DOMObjectGrouperVisitor::visitDOMWrapper):

TBR=antonm@chromium.org

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=81027