Database usage adjustment for .../history

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 62691056361a523a70805d438a369ce09ea7a975..f6fec4e26c125bedec0dbbcae52fa473c9ceed87 100644
--- a/chrome/browser/history/visit_database.h
+++ b/chrome/browser/history/visit_database.h
@@ -69,7 +69,7 @@ class VisitDatabase {
   // is used for history expiration.)
   //
   // The results will be in increasing order of date.
-  void GetAllVisitsInRange(base::Time begin_time, base::Time end_time,
+  bool GetAllVisitsInRange(base::Time begin_time, base::Time end_time,
                            int max_results, VisitVector* visits);
 
   // Fills all visits with specified transition in the time range [begin, end)
@@ -81,7 +81,7 @@ class VisitDatabase {
   // is used for history expiration.)
   //
   // The results will be in increasing order of date.
-  void GetVisitsInRangeForTransition(base::Time begin_time,
+  bool GetVisitsInRangeForTransition(base::Time begin_time,
                                      base::Time end_time,
                                      int max_results,
                                      content::PageTransition transition,
@@ -170,7 +170,7 @@ class VisitDatabase {
 
   // Convenience to fill a VisitVector. Assumes that statement.step()
   // hasn't happened yet.
-  static void FillVisitVector(sql::Statement& statement, VisitVector* visits);
+  static bool FillVisitVector(sql::Statement& statement, VisitVector* visits);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(VisitDatabase);