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cfleizach@apple.com authored
https://bugs.webkit.org/show_bug.cgi?id=125113 Reviewed by Tim Horton. The AXObjectCache can sometimes be null if the render tree has been detached from the document. * WebView/WebFrame.mm: (-[WebFrame accessibilityRoot]): git-svn-id: http://svn.webkit.org/repository/webkit/trunk@160015 268f45cc-cd09-0410-ab3c-d52691b4dbfc
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