GitLab

Also:
- fixes the handling of menuItemSelected to only be respected from a focused node (Chrome now fires it more noisely)
- add a full test suite for options page testing which drives the UI end to end and verifies local ChromeVox state
(this motivated the above fix)
- noticed a regression in the way <select> nodes work (TODO'ed and not handled fixing in this change)
- adds a unit test for verifying number style reading behavior

Test: see above
Change-Id: I4dce435c6de54399128c1a21f805671b54ac3904
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2003895
Commit-Queue: David Tseng <dtseng@chromium.org>
Reviewed-by: Akihiro Ota <akihiroota@chromium.org>
Cr-Commit-Position: refs/heads/master@{#741209}