QueryHistoryRequest 1231 chrome/browser/history/history_backend.cc void HistoryBackend::QueryHistory(scoped_refptr<QueryHistoryRequest> request,
QueryHistoryRequest  165 chrome/browser/history/history_backend.h   void QueryHistory(scoped_refptr<QueryHistoryRequest> request,
QueryHistoryRequest  797 chrome/browser/history/history_service.cc                   new history::QueryHistoryRequest(callback),