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

R=jam@chromium.org

Review URL: https://codereview.chromium.org/23467011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@221553 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/prerender/prerender_local_predictor.cc

@@ -514,6 +514,12 @@ void PrerenderLocalPredictor::OnAddVisit(const history::BriefVisitInfo& info) {
     }
   }
 
+  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) {

chrome/browser/prerender/prerender_local_predictor.h

@@ -118,6 +118,8 @@ class PrerenderLocalPredictor : public history::VisitDatabaseObserver,
     EVENT_CONTINUE_PRERENDER_CHECK_ON_SERVICE_WHITELIST = 68,
     EVENT_CONTINUE_PRERENDER_CHECK_EXAMINE_NEXT_URL_LOCAL = 69,
     EVENT_CONTINUE_PRERENDER_CHECK_EXAMINE_NEXT_URL_SERVICE = 70,
+    EVENT_ADD_VISIT_RELEVANT_TRANSITION_REPEAT_URL = 71,
+    EVENT_ADD_VISIT_RELEVANT_TRANSITION_NEW_URL = 72,
     EVENT_MAX_VALUE
   };