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 4ae0fc1a0f6d2344445d30cee432445739e38446..2dc45afaec30ab6b284f23c7ab49602035d201dd 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -50060,6 +50060,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </histogram>
 
 <histogram name="Power.BatteryDischargePercentPerHour" units="%">
+  <obsolete>
+    Deprecated 02/2017 in favor of better power benchmarks.

[Mark P, 2017/02/24 23:42:35]

optional nit: mention the better benchmark (histograms) by name.
ditto below

[Lei Zhang, 2017/02/28 00:40:50]

My understanding is there are forthcoming power benchmarks that do not depend on
UMA. There's too much variability in power figures from users' machines.

[Mark P, 2017/02/28 00:42:18]

Then please say that these UMA metrics aren't retired because we have better UMA
metrics but that they're retired because you don't trust them due to too much
variability from users' machines.

[Lei Zhang, 2017/02/28 02:27:36]

Done. +benhenry to sanity check what I wrote.

+  </obsolete>
   <owner>jeremy@chromium.org</owner>
   <summary>
         The percentage of battery capacity used per hour relative to a full
@@ -50086,6 +50089,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </histogram>
 
 <histogram name="Power.BatteryDischargeRate_15" units="%">
+  <obsolete>
+    Deprecated 02/2017 in favor of better power benchmarks.
+  </obsolete>
   <owner>jeremy@chromium.org</owner>
   <summary>
         The percent of depleted battery capacity relative to a full battery over
@@ -50100,6 +50106,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </histogram>
 
 <histogram name="Power.BatteryDischargeRate_30" units="%">
+  <obsolete>
+    Deprecated 02/2017 in favor of better power benchmarks.
+  </obsolete>
   <owner>jeremy@chromium.org</owner>
   <summary>
         The percent of depleted battery capacity relative to a full battery over
@@ -50114,6 +50123,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
 </histogram>
 
 <histogram name="Power.BatteryDischargeRate_5" units="%">
+  <obsolete>
+    Deprecated 02/2017 in favor of better power benchmarks.
+  </obsolete>
   <owner>jeremy@chromium.org</owner>
   <summary>
         The percent of depleted battery capacity relative to a full battery over