[Webkit-unassigned] [Bug 45514] New: AX: Add methods used to prevent a Chromium renderer crash

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=45514

           Summary: AX: Add methods used to prevent a Chromium renderer
                    crash
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Accessibility
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: chris.guillory at google.com


Currently the Chromium renderer crashes in WebCore accessibility code when retrieving properties from a AccessibilityRenderObject that has a null m_renderer (which is invalid). 
http://code.google.com/p/chromium/issues/detail?id=54973
http://code.google.com/p/chromium/issues/detail?id=47126
http://code.google.com/p/chromium/issues/detail?id=52538

The issues that lead to a null m_renderer should be tackled. However, instead of crashing on release builds let's the ignore the invalid objects and leave them out of Chromium's accessibility tree. The change adds the methods needed to prevent crashes.

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