Support needed to measure user and service traffic in Chrome.

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 baf2f219f17f0ecd0cd8be3108a431ba5edf035b..ae435ce09f9033537ce11641af090c4fe221f7e2 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -5565,6 +5565,40 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="DataUse.NotUser" units="bytes">
+  <owner>amohammadkhan@chromium.org</owner>
+  <owner>bengr@chromium.org</owner>
+  <summary>
+    The total data use of Chrome's services. This traffic is not requested by
+    Renderer process.
+  </summary>
+</histogram>
+
+<histogram name="DataUse.Service" units="bytes">

[sclittle, 2015/08/26 23:08:30]

Naming is confusing, you have both "DataUse.Service" and "DataUse.Services", and
both have the same description. Please give them more specific names and
different descriptions.

[amohammadkhan, 2015/08/29 01:01:00]

I see your point, but DataUse.Service is never used by itself and a suffix is
added to it always, like DataUse.Service.Suggestions, while the DataUse.Services
doesn't have this suffixes, so I think in the UMA they should be more
distinguishable, and I agree with you about descriptions, I updated them, please
let me know if you still see ambiguity here.

+  <owner>amohammadkhan@chromium.org</owner>
+  <owner>bengr@chromium.org</owner>
+  <summary>
+    The request and reponse size of the messages exchanged by a service.
+  </summary>
+</histogram>
+
+<histogram name="DataUse.Services" enum="DataUseServices">
+  <owner>amohammadkhan@chromium.org</owner>
+  <owner>bengr@chromium.org</owner>
+  <summary>
+    The request and reponse size of the messages exchanged by a service.
+  </summary>
+</histogram>
+
+<histogram name="DataUse.User" units="bytes">
+  <owner>amohammadkhan@chromium.org</owner>
+  <owner>bengr@chromium.org</owner>
+  <summary>
+    The total amount of data use of Chrome for user traffic. This traffic is
+    requested by Renderer process.
+  </summary>
+</histogram>
+
 <histogram name="DefaultBrowser.InteractionResult"
     enum="MakeChromeDefaultResult">
   <owner>gab@chromium.org</owner>
@@ -54832,6 +54866,10 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
       label="Arrived at settings menu by another path: entered on, exited on"/>
 </enum>
 
+<enum name="DataUseServices" type="int">
+  <int value="0" label="Suggestions Service"/>
+</enum>
+
 <enum name="DecodedImageType" type="int">
   <int value="0" label="kImageUnknown"/>
   <int value="1" label="kImageJPEG"/>
@@ -74284,6 +74322,25 @@ To add a new entry, add it with any value and run test to compute valid value.
       name="DataReductionProxy.RequestCompletionErrorCodes.MainFrame"/>
 </histogram_suffixes>
 
+<histogram_suffixes name="DataUse.Dimensions" separator=".">
+  <suffix name="Upload.Background.NotCellular"/>
+  <suffix name="Upload.Background.Cellular"/>
+  <suffix name="Upload.Foreground.NotCellular"/>
+  <suffix name="Upload.Foreground.Cellular"/>
+  <suffix name="Download.Background.NotCellular"/>
+  <suffix name="Download.Background.Cellular"/>
+  <suffix name="Download.Foreground.NotCellular"/>
+  <suffix name="Download.Foreground.Cellular"/>
+  <affected-histogram name="DataUse.NotUser"/>
+  <affected-histogram name="DataUse.Services"/>
+  <affected-histogram name="DataUse.User"/>
+</histogram_suffixes>
+
+<histogram_suffixes name="DataUse.Service.Types" separator=".">
+  <suffix name="Suggestions"/>
+  <affected-histogram name="DataUse.Service"/>
+</histogram_suffixes>
+
 <histogram_suffixes name="DefaultAppsExperiment">
   <suffix name="NoDefaultApps" label="User's without default apps installed"/>
   <suffix name="WithDefaultApps" label="User's with default apps installed"/>