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 778bde8307e04d91858887fe90fe838ec55fbd2d..d71bc89a154f784d5318a77e6004f4e64c8a48b0 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -54077,6 +54077,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="ResourcePrefetchPredictor.CachePattern"
+    enum="HttpCachePattern">
+  <owner>alexilin@chromium.org</owner>
+  <summary>
+    Like HttpCache.Pattern but only for requests made during speculative
+    prefetch. Logged per successful request.
+  </summary>
+</histogram>
+
 <histogram name="ResourcePrefetchPredictor.DatabaseReadiness" units="%">
   <owner>alexilin@chromium.org</owner>
   <summary>
@@ -54506,6 +54515,21 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="ResourcePrefetchPredictor.PrefetchedCount">

[Ilya Sherman, 2017/01/25 18:20:09]

nit: Please add a units attribute.

[alexilin, 2017/01/26 08:41:37]

Done.

+  <owner>alexilin@chromium.org</owner>
+  <summary>
+    The count of successfully prefetched subresources for a single page.

[Ilya Sherman, 2017/01/25 18:20:09]

Please document when this is recorded -- only after all subresources have
reached a terminal success/failure state?

[alexilin, 2017/01/26 08:41:37]

Done.

+  </summary>
+</histogram>
+
+<histogram name="ResourcePrefetchPredictor.PrefetchedSizeKB" units="KB">
+  <owner>alexilin@chromium.org</owner>
+  <summary>
+    The total amount of data consumed by predictor for a single page. Only
+    successfully finished requests taken into account.
+  </summary>
+</histogram>
+
 <histogram name="ResourcePrefetchPredictor.ReportingEvent"
     enum="ResourcePrefetchPredictorReportingEvent">
   <owner>zhenw@chromium.org</owner>