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 9cd4aeb73e09560882ebd20d2a86863eabbd7773..a4fcf4b72310020afd134df87c944b6e4e9ac0e0 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -27045,6 +27045,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </details>
 </histogram>
 
+<histogram name="Net.Prefetch.HitBytes" units="bytes">
+  <owner>jkarlin@chromium.org</owner>
+  <summary>
+    Bytes read for requests that were served from a cache entry filled by a
+    prefetch request. An entry is considered filled by a prefetch if its
+    unused_since_prefetch bit is true.
+  </summary>
+</histogram>
+
 <histogram name="Net.Prefetch.Pattern" enum="PrefetchStatus">
   <owner>jkarlin@chromium.org</owner>
   <summary>
@@ -27076,6 +27085,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Net.Prefetch.TimeSpentOnPrefetchHit" units="ms">
+  <owner>jkarlin@chromium.org</owner>
+  <summary>
+    Time spent on requests that were served from a cache entry filled by a
+    prefetch request. An entry is considered filled by a prefetch if its
+    unused_since_prefetch bit is true.
+  </summary>
+</histogram>
+
 <histogram name="Net.Prefetch.TimeSpentPrefetchingFromCache" units="ms">
   <owner>jkarlin@chromium.org</owner>
   <summary>Time spent on prefetch requests when fetched from cache.</summary>