Record whether navigated to URLs are new or repeat URLs in the history.

chrome/browser/prerender/prerender_local_predictor.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_local_predictor.h"
 
 #include <ctype.h>
 
 #include <algorithm>
 #include <map>
@@ skipping 496 matching lines @@
            it != next_urls_currently_found.end();
            ++it) {
         std::pair<std::map<URLID, int>::iterator, bool> insert_ret =
             next_urls_num_found.insert(std::pair<URLID, int>(*it, 0));
         std::map<URLID, int>::iterator num_found_it = insert_ret.first;
         num_found_it->second++;
       }
     }
   }
 
+  if (num_occurrences_of_current_visit > 1) {
+    RecordEvent(EVENT_ADD_VISIT_RELEVANT_TRANSITION_REPEAT_URL);
+  } else {
+    RecordEvent(EVENT_ADD_VISIT_RELEVANT_TRANSITION_NEW_URL);
+  }
+
   for (std::map<URLID, int>::const_iterator it = next_urls_num_found.begin();
        it != next_urls_num_found.end();
        ++it) {
     // Only consider a candidate next page for prerendering if it was viewed
     // at least twice, and at least 10% of the time.
     if (num_occurrences_of_current_visit > 0 &&
         it->second > 1 &&
         it->second * 10 >= num_occurrences_of_current_visit) {
       RecordEvent(EVENT_ADD_VISIT_IDENTIFIED_PRERENDER_CANDIDATE);
       double priority = static_cast<double>(it->second) /
@@ skipping 739 matching lines @@
   }
   if (best_matched_prerender) {
     RecordEvent(EVENT_TAB_HELPER_URL_SEEN_MATCH);
     best_matched_prerender->would_have_matched = true;
     if (session_storage_namespace_matches)
       RecordEvent(EVENT_TAB_HELPER_URL_SEEN_NAMESPACE_MATCH);
   }
 }
 
 }  // namespace prerender