GetVisibleVisitCountToHostRequest 1381 chrome/browser/history/history_backend.cc     scoped_refptr<GetVisibleVisitCountToHostRequest> request,
GetVisibleVisitCountToHostRequest  174 chrome/browser/history/history_backend.h       scoped_refptr<GetVisibleVisitCountToHostRequest> request,
GetVisibleVisitCountToHostRequest  825 chrome/browser/history/history_service.cc       consumer, new history::GetVisibleVisitCountToHostRequest(callback), url);