Create prerender event histograms by origin & experiment.

chrome/browser/prerender/prerender_histograms.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/prerender/prerender_histograms.h"
 
 #include <string>
 
 #include "base/format_macros.h"
 #include "base/metrics/histogram.h"
@@ skipping 369 matching lines @@
   }
   if (mc_status == PrerenderContents::MATCH_COMPLETE_DEFAULT ||
       mc_status == PrerenderContents::MATCH_COMPLETE_REPLACEMENT ||
       mc_status == PrerenderContents::MATCH_COMPLETE_REPLACEMENT_PENDING) {
     PREFIXED_HISTOGRAM_ORIGIN_EXPERIMENT(
         "FinalStatusMatchComplete", origin, experiment_id,
         UMA_HISTOGRAM_ENUMERATION(name, final_status, FINAL_STATUS_MAX));
   }
 }
 
-void PrerenderHistograms::RecordEvent(PrerenderEvent event) const {
+void PrerenderHistograms::RecordEvent(Origin origin, uint8 experiment_id,
+                                      PrerenderEvent event) const {
   DCHECK_LT(event, PRERENDER_EVENT_MAX);
-  UMA_HISTOGRAM_ENUMERATION("Prerender.Event", event, PRERENDER_EVENT_MAX);
+  PREFIXED_HISTOGRAM_ORIGIN_EXPERIMENT(
+      "Event", origin, experiment_id,
+      UMA_HISTOGRAM_ENUMERATION(name, event, PRERENDER_EVENT_MAX));
 }
 
 uint8 PrerenderHistograms::GetCurrentExperimentId() const {
   if (!WithinWindow())
     return kNoExperiment;
   return last_experiment_id_;
 }
 
 bool PrerenderHistograms::IsOriginExperimentWash() const {
   if (!WithinWindow())
     return false;
   return origin_experiment_wash_;
 }
 
 }  // namespace prerender