FLEDGE: WPT test some of the B&A message and checking.
... with focus on single-party auctions.
Change-Id: Ifb65d0b67ebf4293224bd8a12e9fa724b2320de7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5866311
Reviewed-by: Russ Hamilton behamilton@google.com
Commit-Queue: Maks Orlovich morlovich@chromium.org
Cr-Commit-Position: refs/heads/main@{#1357738}