Added a metric for tracking non-zero TPM dictionary-attack counters.

BUG=chromium:341358
TEST=manual

Change-Id: I99d3e4279c6d9185b9b515259d4fe511e0d79874
Reviewed-on: https://chromium-review.googlesource.com/185493
Reviewed-by: Luigi Semenzato <semenzato@chromium.org>
Commit-Queue: Darren Krahn <dkrahn@chromium.org>
Tested-by: Darren Krahn <dkrahn@chromium.org>
diff --git a/metrics/metrics_library.cc b/metrics/metrics_library.cc
index 3165561..12b0c71 100644
--- a/metrics/metrics_library.cc
+++ b/metrics/metrics_library.cc
@@ -45,6 +45,7 @@
   "SpringPowerSupply.Other.High",  // 8
   "SpringPowerSupply.Original.Low",  // 9
   "SpringPowerSupply.ChargerIdle",  // 10
+  "TPM.NonZeroDictionaryAttackCounter",  // 11
 };
 
 time_t MetricsLibrary::cached_enabled_time_ = 0;