[A11y] Remove Accessibility Object Model (AOM)
Follow-ups will completely remove AccessibleNode, which is still used
for its static methods for ARIA property retrieval in ordinary
Bug: 369945541
Change-Id: If4201088b86de9a88e1b611fae2e88a8ba3439ac
Cq-Do-Not-Cancel-Tryjobs: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5896593
Reviewed-by: Tzarial zork@chromium.org
Reviewed-by: Demetrios Papadopoulos dpapad@chromium.org
Reviewed-by: Richard (Torne) Coles torne@chromium.org
Reviewed-by: Nico Weber thakis@chromium.org
Reviewed-by: Chris Harrelson chrishtr@chromium.org
Commit-Queue: Daniel Cheng dcheng@chromium.org
Reviewed-by: Daniel Cheng dcheng@chromium.org
Reviewed-by: Alex Moshchuk alexmos@chromium.org
Reviewed-by: Mason Freed masonf@chromium.org
Auto-Submit: Aaron Leventhal aleventhal@chromium.org
Cr-Commit-Position: refs/heads/main@{#1364497}