Record data use of user traffic by different core page transition types

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 a868c97bf2d2ffcd0546c06391f894fec0080672..fc0136c091902a3e89b8c906333d6d5a33ba4494 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -10490,6 +10490,16 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="DataUse.PageTransition.UserTraffic"
+    enum="DataUsePageTransition" units="bytes">
+  <owner>rajendrant@chromium.org</owner>
+  <owner>bengr@chromium.org</owner>
+  <summary>
+    Data use of user traffic by different core page transition types. Recorded
+    when the URL request finishes.
+  </summary>
+</histogram>
+
 <histogram name="DataUse.Sync.Download.Bytes" enum="SyncModelTypes">
   <owner>amohammadkhan@chromium.org</owner>
   <owner>bengr@chromium.org</owner>
@@ -86866,6 +86876,21 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <int value="12" label="Video - Tab in foreground"/>
 </enum>
 
+<enum name="DataUsePageTransition" type="int">
+  <summary>PageTransitions in ui/base/page_transition_types.h.</summary>
+  <int value="0" label="LINK"/>
+  <int value="1" label="TYPED"/>
+  <int value="2" label="AUTO_BOOKMARK"/>
+  <int value="3" label="SUBFRAME"/>
+  <int value="4" label="GENERATED"/>
+  <int value="5" label="AUTO_TOPLEVEL"/>
+  <int value="6" label="FORM_SUBMIT"/>
+  <int value="7" label="RELOAD"/>
+  <int value="8" label="KEYWORD"/>
+  <int value="9" label="FORWARD_BACK"/>
+  <int value="10" label="HOME_PAGE"/>
+</enum>
+
 <enum name="DataUseServices" type="int">
   <int value="0" label="Not Tagged"/>
   <int value="1" label="Suggestions"/>