HistoryDBTaskRequest 2502 chrome/browser/history/history_backend.cc   HistoryDBTaskRequest* request = db_task_requests_.front();
HistoryDBTaskRequest 2519 chrome/browser/history/history_backend.cc   for (std::list<HistoryDBTaskRequest*>::iterator i =
HistoryDBTaskRequest 2706 chrome/browser/history/history_backend.cc     scoped_refptr<HistoryDBTaskRequest> request) {
HistoryDBTaskRequest  370 chrome/browser/history/history_backend.h   void ProcessDBTask(scoped_refptr<HistoryDBTaskRequest> request);
HistoryDBTaskRequest  861 chrome/browser/history/history_backend.h   std::list<HistoryDBTaskRequest*> db_task_requests_;
HistoryDBTaskRequest  400 chrome/browser/history/history_service.cc   history::HistoryDBTaskRequest* request = new history::HistoryDBTaskRequest(