Refactor sending NOTIFICATION_HISTORY_URL_VISITED

components/history/core/browser/history_service_observer.h

Index: components/history/core/browser/history_service_observer.h
diff --git a/components/history/core/browser/history_service_observer.h b/components/history/core/browser/history_service_observer.h
index 6f1608be0edec83dec39f58ca085151702833403..3945aec2ff3d0b7ec93a3d33757c473c251f3841 100644
--- a/components/history/core/browser/history_service_observer.h
+++ b/components/history/core/browser/history_service_observer.h
@@ -17,6 +17,19 @@ class HistoryServiceObserver {
   HistoryServiceObserver() {}
   virtual ~HistoryServiceObserver() {}
 
+  // Called when user visits an URL.
+  //
+  // The |row| ID will be set to the value that is currently in effect in the
+  // main history database. |redirects| is the list of redirects leading up to
+  // the URL. If we have a redirect chain A -> B -> C and user is visiting C,
+  // then |redirects[0]=B| and |redirects[1]=A|. If there are no redirects,
+  // |redirects| is an empty vector.
+  virtual void OnURLVisited(HistoryService* history_service,
+                            ui::PageTransition transition,
+                            const URLRow& row,
+                            const RedirectList& redirects,
+                            base::Time visit_time) {}
+
   // Called on changes to the VisitDatabase.
   virtual void OnAddVisit(HistoryService* history_service,
                           const BriefVisitInfo& info) {}