Record the tab state during data use

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 32349fca2bfbaf994f06b8a32680bdc77ecda2c7..40f473378abf003842615a37e701526750383a85 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -9385,6 +9385,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="DataUse.AppTabState" units="bytes">
+  <owner>rajendrant@chromium.org</owner>
+  <owner>bengr@chromium.org</owner>
+  <summary>
+    Records the data use of Chrome user traffic by the foregound vs. background
+    state of the app and tab.
+  </summary>
+</histogram>
+
 <histogram name="DataUse.BackgroundToDataRecievedPerByte" units="ms">
   <owner>rajendrant@chromium.org</owner>
   <owner>bengr@chromium.org</owner>
@@ -109315,6 +109324,16 @@ value.
   <affected-histogram name="DataUsage.ReportSubmission.Bytes"/>
 </histogram_suffixes>
 
+<histogram_suffixes name="DataUse.AppTabState.Dimensions" separator=".">
+  <suffix name="Upstream.AppBackground"/>
+  <suffix name="Upstream.AppForeground.TabBackground"/>
+  <suffix name="Upstream.AppForeground.TabForeground"/>
+  <suffix name="Downstream.AppBackground"/>
+  <suffix name="Downstream.AppForeground.TabBackground"/>
+  <suffix name="Downstream.AppForeground.TabForeground"/>
+  <affected-histogram name="DataUse.AppTabState"/>
+</histogram_suffixes>
+
 <histogram_suffixes name="DataUse.Bytes" separator=".">
   <suffix name="Delegate" label="As reported by the network delegate."/>
   <suffix name="OS"