Add testing of switching appearance on customizable- picker
This new test exercises the appearance property on the picker of
with appearance:base-select. In particular, it tries to
change the picker appearance while the picker is open. The desired
behavior is that doing this closes the picker, and does not re-open
it, to avoid both hysteresis and oscillation.
This currently hits a few CHECKs in different areas of the codebase,
so I can't really evaluate whether all of the test is accurate. Once
the crashers are fixed, we can see.
Bug: 364924715, 364924718
Change-Id: Ief448bdb0cf9d3d37032ff7bbc257fcea00a1ccc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5840689
Reviewed-by: David Baron dbaron@chromium.org
Commit-Queue: Mason Freed masonf@chromium.org
Auto-Submit: Mason Freed masonf@chromium.org
Cr-Commit-Position: refs/heads/main@{#1352262}