Use panel or unknown AtkRole for nodes with unknown roles

Typically, Views nodes that have an unknown role are one of a variety
of views. The ATK_ROLE_PANEL is a more accurate classification for
these. For other nodes with an unknown role we can use ATK_ROLE_UNKNOWN.

Bug: 866344
Change-Id: Ifae26ec0f04487abfec86d57df7914ab459967cd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1741921
Reviewed-by: Joanmarie Diggs <jdiggs@igalia.com>
Commit-Queue: Martin Robinson <mrobinson@igalia.com>
Cr-Commit-Position: refs/heads/master@{#685261}
1 file changed