Reviewed by Simon Fraser.

        Crash on www.crave.cnet.com in FrameView::windowClipRect()
        https://bugs.webkit.org/show_bug.cgi?id=56393

        Tests that a plugin of a swf file in a hidden iframe will not
        crash. This test required more than 1 content file and a
        timeout or else it would not repeat the error condition.

        This test will only crash on platforms (like Symbian) that
        don't allow nonvirtual functions to have a null this pointer.

        * plugins/hidden-iframe-with-swf-plugin-expected.txt: Added.
        * plugins/hidden-iframe-with-swf-plugin.html: Added.
        * plugins/resources/iframe-content-with-swf-plugin.html: Added.
2011-06-27  Joe Wild  <joseph.wild@nokia.com>

        Reviewed by Simon Fraser.

        Crash on www.crave.cnet.com in FrameView::windowClipRect()
        https://bugs.webkit.org/show_bug.cgi?id=56393

        Check for a null renderer to fix a crash. This situation can
        arise when external content/plugins is referenced from html
        elements with style="display:none".

        Test: plugins/hidden-iframe-with-swf-plugin.html

        * page/FrameView.cpp:
        (WebCore::FrameView::windowClipRect):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@89876 268f45cc-cd09-0410-ab3c-d52691b4dbfc