GitLab

This rolls up to sha e7928355119c150c784d2d32da699717f61ed346

This brings in the async_test return-value change, as well as some
changes to testdriver.

Bug: None
Change-Id: I49022e105c8ea6070eeee7031b3002eefbdb0d3f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2432628Reviewed-by: Robert Ma <robertma@chromium.org>
Commit-Queue: Stephen McGruer <smcgruer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#811215}