Extend ML Service histograms.

Bug: 1167857, 1167858, 11678595, 1167860, 1167861
Change-Id: I72754b1d8e99bcb75e7bf8b0004dc4a45d77909a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2642751Reviewed-by: Brian White <bcwhite@chromium.org>
Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Commit-Queue: Brian White <bcwhite@chromium.org>
Auto-Submit: Michael Crouse <mcrouse@chromium.org>
Cr-Commit-Position: refs/heads/master@{#846381}

tools/metrics/histograms/histograms_xml/chrome/OWNERS

+# Prefer chromium-metrics-reviews@google.com instead.
+# Use the following owners only if:
+#  - The reviewer is available for review.
+#  - You work in the same area as them.
+#  - They are already a good reviewer for the non-metrics part of the CL.
+# See tools/metrics/histograms/OWNERS for details.
+tbansal@chromium.org
\ No newline at end of file

tools/metrics/histograms/histograms_xml/chrome/histograms.xml

@@ -244,7 +244,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram base="true" name="ChromeMLService.EvaluationLatency" units="ms"
-    expires_after="2021-02-27">
+    expires_after="M92">
   <owner>mcrouse@chromium.org</owner>
   <owner>sophiechang@chromium.org</owner>
   <summary>
@@ -255,7 +255,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram base="true" name="ChromeMLService.LoadModelResult"
-    enum="ChromeMLServiceLoadModelResult" expires_after="2021-02-27">
+    enum="ChromeMLServiceLoadModelResult" expires_after="M92">
   <owner>mcrouse@chromium.org</owner>
   <owner>sophiechang@chromium.org</owner>
   <summary>
@@ -264,8 +264,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="ChromeMLService.PredictionResult.DecisionTreeModel"
-    enum="ChromeMLServiceDecisionTreePredictionResult"
-    expires_after="2021-02-27">
+    enum="ChromeMLServiceDecisionTreePredictionResult" expires_after="M92">
   <owner>mcrouse@chromium.org</owner>
   <owner>sophiechang@chromium.org</owner>
   <summary>
@@ -274,7 +273,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="ChromeMLService.ServiceAliveDuration" units="ms"
-    expires_after="2021-02-27">
+    expires_after="M92">
   <owner>mcrouse@chromium.org</owner>
   <owner>sophiechang@chromium.org</owner>
   <summary>
@@ -285,28 +284,28 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="ChromeMLService.ServiceCrash" enum="Boolean"
-    expires_after="2021-02-27">
+    expires_after="M92">
   <owner>mcrouse@chromium.org</owner>
   <owner>sophiechang@chromium.org</owner>
   <summary>Records if the Chrome ML Service crashed.</summary>
 </histogram>
 
 <histogram name="ChromeMLService.ServiceLaunch" enum="Boolean"
-    expires_after="2021-02-27">
+    expires_after="M92">
   <owner>mcrouse@chromium.org</owner>
   <owner>sophiechang@chromium.org</owner>
   <summary>Records if the Chrome ML Service launched successfully.</summary>
 </histogram>
 
 <histogram name="ChromeMLService.ServiceNormalTermination" enum="Boolean"
-    expires_after="2021-02-27">
+    expires_after="M92">
   <owner>mcrouse@chromium.org</owner>
   <owner>sophiechang@chromium.org</owner>
   <summary>Records if the Chrome ML Service terminated normally.</summary>
 </histogram>
 
 <histogram name="ChromeMLService.ServiceStatusWhenRequested"
-    enum="ChromeMLServiceRequestStatus" expires_after="2021-02-27">
+    enum="ChromeMLServiceRequestStatus" expires_after="M92">
   <owner>mcrouse@chromium.org</owner>
   <owner>sophiechang@chromium.org</owner>
   <summary>
@@ -315,7 +314,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram base="true" name="ChromeMLService.ValidationLatency" units="ms"
-    expires_after="2021-02-27">
+    expires_after="M92">
   <owner>mcrouse@chromium.org</owner>
   <owner>sophiechang@chromium.org</owner>
   <summary>