Added a check for non-zero dictionary attack counters. On every boot we attempt to measure the TPM dictionary attack counter. We send a metric and log if the counter was successfully measured and if it is non-zero. BUG=chromium:341358 TEST=manual Change-Id: I27bc21a9a581f9062e3b253b666da63ca7a7f948 Reviewed-on: https://chromium-review.googlesource.com/185494 Reviewed-by: Darren Krahn <[email protected]> Tested-by: Darren Krahn <[email protected]> Commit-Queue: Darren Krahn <[email protected]>