Change 9789001: attempt #3 after fixing the problems with linux Created by Wei Li: https://chromium…

chrome/browser/history/visit_database.h

Index: chrome/browser/history/visit_database.h
diff --git a/chrome/browser/history/visit_database.h b/chrome/browser/history/visit_database.h
index 9f56bd50ee3da8b472d4a558bd061c27f4b17656..988f0c7833ed1eb304186e9a3a1849c79c69d01e 100644
--- a/chrome/browser/history/visit_database.h
+++ b/chrome/browser/history/visit_database.h
@@ -188,6 +188,10 @@ class VisitDatabase {
   // hasn't happened yet.
   static bool FillVisitVector(sql::Statement& statement, VisitVector* visits);
 
+  // Called by the derived classes to migrate the older visits table which
+  // don't have visit_duration column yet.
+  bool MigrateVisitsWithoutDuration();
+
  private:
 
   DISALLOW_COPY_AND_ASSIGN(VisitDatabase);