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It will now receive public key id from caller (server in prod mode)
rather than calculating it locally. This was we avoid any discrepancy
between the way it is calculated on the server and on the client.

Bug: b:153651358
Change-Id: If1d43e7c86c142ed8be753b14b49976f9f5659ce
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2510609Reviewed-by: Zach Trudo <zatrudo@google.com>
Commit-Queue: Leonid Baraz <lbaraz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#822761}