[Webkit-unassigned] [Bug 117456] New: Fix issue where iframe content wasn't included in the accessibility tree

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=117456

           Summary: Fix issue where iframe content wasn't included in the
                    accessibility tree
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Keywords: BlinkMergeCandidate
          Severity: Normal
          Priority: P2
         Component: Accessibility
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: rniwa at webkit.org
                CC: darin at apple.com, cfleizach at apple.com


Consider merging https://chromium.googlesource.com/chromium/blink/+/af4e73e2bfb32fce56854ef0dab33077c7fa6bff

Have RenderWidget notify the accessibility object when its widget changes,
otherwise the AccessibilityRenderObject for the iframe might have a stale
reference to the previous widget. (This wouldn't crash, it'd just result in
an empty subtree until some other event triggered it to update.)

Also, remove a check that made isAttachment return false if an iframe
element had an ARIA role. I don't believe an ARIA role on an iframe should
ever have the effect of hiding its contents - it's unlikely that's what the web
author wanted, and if the web author really wants that they can use
aria-hidden.

This allows us to re-enable this test, that was previously
failing flakily because of this bug: loading-iframe-updates-axtree.html

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