GitLab

When prelighting credential IDs for getting an assertion, only send the
matching credential ID on the following up=1 request, rather than the
whole matching batch.

Change-Id: I41534e82306b82c2332b44deb6466a9ee46c2905
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2250893
Commit-Queue: Adam Langley <agl@chromium.org>
Reviewed-by: Martin Kreichgauer <martinkr@google.com>
Cr-Commit-Position: refs/heads/master@{#780525}