gecko-dev/accessible
James Teh 1ace808723 Bug 1568163: Don't return proxy wrappers from OuterDocAccessible::ChildAtPoint with eDeepestChild to prevent crashes when hit testing via XPCOM. r=yzen
On Windows, OuterDocAccessible::GetChildAt can return a proxy wrapper for a remote document.
These aren't real Accessibles and shouldn't be returned except to the Windows a11y code (which doesn't use eDeepestChild).
Calling ChildAtPoint on these will crash!
Therefore, just return null in this case.

Differential Revision: https://phabricator.services.mozilla.com/D39135

--HG--
extra : moz-landing-system : lando
2019-07-24 13:32:22 +00:00
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