GitLab

We are deprecating attestation methods by CryptohomeClient.

BUG=b:158955123
TEST=unit_tests.

Change-Id: I901403863794308619bec161354884808988b2f3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2497386Reviewed-by: Maksim Ivanov <emaxx@chromium.org>
Reviewed-by: Michael Ershov <miersh@google.com>
Commit-Queue: Leo Lai <cylai@google.com>
Cr-Commit-Position: refs/heads/master@{#821186}