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This is a reland of 67a4df6f
CL was reverted cause of failing
chromeos-betty-pi-arc-cfi-thin-lto-chrome due to reaching deadline
on one of the tests. This is gonna be fixed by increasing time limit.
See details here: https://crbug.com/1116379

Original change's description:
> LoginScreen: Show TPM lock status.
>
> If TPM is locked show banner with steps on how to fix this issue.
>
> Bug: 1114656
> Change-Id: I85dab0f4ce003ac3dad61c318efb3333457993ac
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2346266
> Reviewed-by: Toni Baržić <tbarzic@chromium.org>
> Commit-Queue: Roman Aleksandrov <raleksandrov@google.com>
> Cr-Commit-Position: refs/heads/master@{#797992}

Bug: 1114656
Change-Id: Iba50daf1d1b892539e00d9be04fc2b8c0a5a279e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2359992Reviewed-by: Denis Kuznetsov [CET] <antrim@chromium.org>
Commit-Queue: Roman Aleksandrov <raleksandrov@google.com>
Cr-Commit-Position: refs/heads/master@{#798698}