histograms: Added Platform.TPM.DictionaryAttackResetStatus.

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index b0cd13f738e0803d74fdd98c1a0abf4ddc2f6b53..7f46b9adec7528845dead551ff46e217cfb4fd73 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -24990,6 +24990,15 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   </summary>
 </histogram>
 
+<histogram name="Platform.TPM.DictionaryAttackResetStatus"
+    enum="CrosTPMDictionaryAttackResetStatusEnum">
+  <owner>dkrahn@chromium.org</owner>
+  <summary>
+    Each sample is the status of a periodic attempt to reset the TPM dictionary
+    attack counter.
+  </summary>
+</histogram>
+
 <histogram name="Platform.TPMForcedReboot" units="reboots">
   <owner>dkrahn@chromium.org</owner>
   <summary>
@@ -44578,6 +44587,15 @@ Therefore, the affected-histogram name has to have at least one dot in it.
   <int value="8" label="PlayMusic"/>
 </enum>
 
+<enum name="CrosTPMDictionaryAttackResetStatusEnum" type="int">
+  <int value="0" label="Reset not necessary"/>
+  <int value="1" label="Reset attempt succeeded"/>
+  <int value="2" label="Reset attempt failed"/>
+  <int value="3" label="TPM owner delegate not allowed to reset"/>
+  <int value="4" label="TPM owner delegate does not exist"/>
+  <int value="5" label="Failed to query dictionary attack counter"/>
+</enum>
+
 <enum name="CryptohomeError" type="int">
   <int value="1" label="TPM returned TPM_E_FAIL"/>
   <int value="2" label="TCS key load failed"/>