Speculative fix for Clusterfuzz bug where
a crash occurs in UpdateLayout() on the line
`factory()->GetAXContext()->UpdateAXForAllDocuments();`.
Fixed: 1487291
Change-Id: Iddd631bf55434df4d927c40a67bd56df98db0e48
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5198449
Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
Commit-Queue: Aaron Leventhal <aleventhal@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1248927}