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    2010-08-05 Tony Chang <tony@chromium.org> · ee645833
    tony@chromium.org authored
            Reviewed by David Hyatt.
    
            Fix a crash when a hidden iframe with a custom scrollbar finishes loading an image.
            https://bugs.webkit.org/show_bug.cgi?id=42724
    
            * scrollbars/hidden-iframe-scrollbar-crash2.html: Added.
            * scrollbars/resources/hidden-iframe-scrollbar-crash2.html: Added.
    2010-08-05  Tony Chang  <tony@chromium.org>
    
            Reviewed by David Hyatt.
    
            Fix a crash when a hidden iframe with a custom scrollbar finishes loading an image.
            https://bugs.webkit.org/show_bug.cgi?id=42724
    
            Test: scrollbars/hidden-iframe-scrollbar-crash2.html
    
            * page/FrameView.cpp:
            (WebCore::FrameView::createScrollbar):
            * rendering/RenderScrollbar.cpp:
            (WebCore::RenderScrollbar::createCustomScrollbar): Pass in Frame
            (WebCore::RenderScrollbar::RenderScrollbar): Pass in Frame
            (WebCore::RenderScrollbar::owningRenderer): Use the frame to get the RenderBox
            (WebCore::RenderScrollbar::getScrollbarPseudoStyle):
            (WebCore::RenderScrollbar::updateScrollbarParts):
            (WebCore::RenderScrollbar::updateScrollbarPart):
            * rendering/RenderScrollbar.h:
            * rendering/RenderScrollbarPart.cpp:
            (WebCore::RenderScrollbarPart::computeScrollbarWidth): null check
            (WebCore::RenderScrollbarPart::computeScrollbarHeight): null check
    
    git-svn-id: http://svn.webkit.org/repository/webkit/trunk@64780 268f45cc-cd09-0410-ab3c-d52691b4dbfc
    ee645833