Reports Prerender and Profile Total Bytes

chrome/browser/prerender/prerender_histograms.cc

Index: chrome/browser/prerender/prerender_histograms.cc
diff --git a/chrome/browser/prerender/prerender_histograms.cc b/chrome/browser/prerender/prerender_histograms.cc
index 236c17d4e85e3420b85a2e29dc52d916fef6a88c..2eead79bfeea757e2270cfe66fbf63147c739764 100644
--- a/chrome/browser/prerender/prerender_histograms.cc
+++ b/chrome/browser/prerender/prerender_histograms.cc
@@ -409,6 +409,20 @@ void PrerenderHistograms::RecordPrerenderPageVisitedStatus(
       UMA_HISTOGRAM_BOOLEAN(name, visited_before));
 }
 
+void PrerenderHistograms::RecordNetworkBytes(bool used,
+                                             int64 prerender_bytes,
+                                             int64 profile_bytes) {
+  if (used) {
+    UMA_HISTOGRAM_COUNTS("Prerender.NetworkBytes.Used.KB",
+                         prerender_bytes >> 10);

[Alexei Svitkine (slow), 2014/02/13 15:50:50]

Wouldn't you be losing the remainder bytes each time you log this?

Perhaps it would be better to log the raw byte counts instead, rather than the
KB?

Alternatively, maybe you can keep a running total of the remainder that you add
to the value each time its logged (and update the new remainder)?

[jkarlin, 2014/02/13 16:04:14]

Done.

+  } else {
+    UMA_HISTOGRAM_COUNTS("Prerender.NetworkBytes.Wasted.KB",
+                         prerender_bytes >> 10);
+  }
+  UMA_HISTOGRAM_COUNTS("Prerender.NetworkBytes.TotalForProfile.KB",
+                       profile_bytes >> 10);
+}
+
 uint8 PrerenderHistograms::GetCurrentExperimentId() const {
   if (!WithinWindow())
     return kNoExperiment;