2010-12-24 Justin Schuh <jschuh@chromium.org>

2010-12-24  Justin Schuh  <jschuh@chromium.org>

        Reviewed by Nikolas Zimmermann.

        SVGElementInstance::m_useElement should be cleared when use element is removed from document
        https://bugs.webkit.org/show_bug.cgi?id=51486

        Test: svg/custom/use-instanceRoot-with-use-removed.svg

        * svg/SVGElementInstance.cpp:
        (WebCore::SVGElementInstance::invalidateAllInstancesOfElement):
        * svg/SVGElementInstance.h:
        (WebCore::SVGElementInstance::clearUseElement):
        * svg/SVGUseElement.cpp:
        (WebCore::SVGUseElement::removedFromDocument):
        (WebCore::ShadowTreeUpdateBlocker::if):
        (WebCore::SVGUseElement::detachInstance):
        (WebCore::SVGUseElement::detach):
        * svg/SVGUseElement.h:
2010-12-24  Justin Schuh  <jschuh@chromium.org>

        Reviewed by Nikolas Zimmermann.

        SVGElementInstance::m_useElement should be cleared when use element is removed from document
        https://bugs.webkit.org/show_bug.cgi?id=51486

        * svg/custom/use-instanceRoot-with-use-removed-expected.txt: Added.
        * svg/custom/use-instanceRoot-with-use-removed.svg: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@74636 268f45cc-cd09-0410-ab3c-d52691b4dbfc