GitLab

Add separate unit tests for TpmChallengeKeySubtle
and TpmChallengeKeyResult.

Bug: 1090723
Test: TpmChallenge*
Change-Id: I267e029410539070435cacbb98409bef1c40a8cc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2228725
Commit-Queue: Michael Ershov <miersh@google.com>
Reviewed-by: Maksim Ivanov <emaxx@chromium.org>
Cr-Commit-Position: refs/heads/master@{#797225}