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 2b3e0a437a3d5d2ef7fd03ae63e7c67d2880695f..43ce14d30c9d9c9293531c1e8c0448e517b0d121 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -6748,6 +6748,9 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
     enum="DataReductionProxyAutoLoFiAccuracy">
   <owner>bengr@chromium.org</owner>
   <owner>tbansal@chromium.org</owner>
+  <obsolete>
+    Obsoleted in April 2016.
+  </obsolete>
   <summary>
     Counts the accuracy of estimated network quality when using Lo-Fi. Counters
     are incremented when a main frame URL request is handled by Data Reduction
@@ -7108,6 +7111,19 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <summary>Size of Data Reduction Proxy LevelDB measured at startup.</summary>
 </histogram>
 
+<histogram name="DataReductionProxy.LoFi.Accuracy"
+    enum="DataReductionProxyAutoLoFiAccuracy">
+  <owner>bengr@chromium.org</owner>
+  <owner>tbansal@chromium.org</owner>
+  <summary>
+    Records the accuracy of estimated network quality when using Lo-Fi. Network
+    quality predicted at the time of navigation start is compared with the
+    network quality observed during the specified time interval following the
+    start of the navigation. This metric is recorded only when the session is in
+    Lo-Fi enabled field trial.
+  </summary>
+</histogram>
+
 <histogram name="DataReductionProxy.LoFi.ImplicitOptOutAction"
     enum="DataReductionProxyLoFiImplicitOptOutAction">
   <owner>bengr@chromium.org</owner>
@@ -88239,6 +88255,18 @@ To add a new entry, add it with any value and run test to compute valid value.
   <affected-histogram name="PLT.PT_StartToFinish"/>
 </histogram_suffixes>
 
+<histogram_suffixes
+    name="DataReductionProxy.LoFi.Accuracy.DifferentRecordingIntervals"
+    separator=".">
+  <suffix name="15"
+      label="Recorded approximately 15 seconds after navigation start"/>
+  <suffix name="30"
+      label="Recorded approximately 30 seconds after navigation start"/>
+  <suffix name="60"
+      label="Recorded approximately 60 seconds after navigation start"/>
+  <affected-histogram name="DataReductionProxy.LoFi.Accuracy"/>
+</histogram_suffixes>
+
 <histogram_suffixes name="DataReductionProxy.MimeType">
   <suffix name="Application" label="Application mime-type"/>
   <suffix name="Unknown"
@@ -88268,11 +88296,29 @@ To add a new entry, add it with any value and run test to compute valid value.
   <suffix name="4G" label="On 4G network"/>
   <suffix name="None" label="With no detected network"/>
   <suffix name="Bluetooth" label="On Bluetooth network"/>
-  <affected-histogram name="DataReductionProxy.AutoLoFiAccuracy"/>

[Alexei Svitkine (slow), 2016/04/18 20:35:09]

Mark the suffix as <obsolete>. See for e.g. CreateSession under EmePromise.

Also, you can just not change it too, since it will inherit the obsoleteness of
the base histogram.

[tbansal1, 2016/04/18 22:37:35]

Done. Thanks, I was not sure if I could deprecate a specific suffix.

   <affected-histogram name="DataReductionProxy.AutoLoFiRequestHeaderState"/>
+  <affected-histogram name="DataReductionProxy.LoFi.Accuracy.15"/>
+  <affected-histogram name="DataReductionProxy.LoFi.Accuracy.30"/>
+  <affected-histogram name="DataReductionProxy.LoFi.Accuracy.60"/>
   <affected-histogram name="DataReductionProxy.LoFi.ImplicitOptOutAction"/>
 </histogram_suffixes>
 
+<histogram_suffixes name="DataReductionProxy.NetworkTypes.Obsoleted"
+    separator=".">
+  <obsolete>
+    Obsoleted
+  </obsolete>
+  <suffix name="Unknown" label="On Unknown network"/>
+  <suffix name="Ethernet" label="On Ethernet network"/>
+  <suffix name="WiFi" label="On WiFi network"/>
+  <suffix name="2G" label="On 2G network"/>
+  <suffix name="3G" label="On 3G Network"/>
+  <suffix name="4G" label="On 4G network"/>
+  <suffix name="None" label="With no detected network"/>
+  <suffix name="Bluetooth" label="On Bluetooth network"/>
+  <affected-histogram name="DataReductionProxy.AutoLoFiAccuracy"/>
+</histogram_suffixes>
+
 <histogram_suffixes name="DataReductionProxy.WithValidOCL.LoFiOn" separator=".">
   <suffix name="LoFiOn"
       label="Only page loads through the data reduction proxy with Lo-Fi On