GitLab

Added documentation for IA2 to UIA element runtime look up. This will
help ATs to utilize the new feature for looking up an UIA element
from an IA2 element.

Bug: 1084630
Change-Id: Iec674312c4a7b0c1117402c2e78dffbd4c25c304
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2267434Reviewed-by: Charlie Reis <creis@chromium.org>
Reviewed-by: Kevin Babbitt <kbabbitt@microsoft.com>
Reviewed-by: Aaron Leventhal <aleventhal@chromium.org>
Reviewed-by: Nektarios Paisios <nektar@chromium.org>
Commit-Queue: Victor Fei <vicfei@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#813088}