James Teh 8b6bb7ad30 Bug 1735722 part 2: Add HyperTextAccessibleBase::LinkAt. r=morgan
This uses the unified Accessible::EmbeddedChildAt from the previous patch.
HyperTextAccessible::LinkAt still exists, since there are still some callers that depend on it returning a LocalAccessible.
xpcAccessibleHyperText has also been updated to call this, which means tests will work on Windows when the cache is enabled.

Differential Revision: https://phabricator.services.mozilla.com/D128551
2021-10-19 03:57:18 +00:00
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