QuerySegmentUsageRequest 1064 chrome/browser/history/history_backend.cc     scoped_refptr<QuerySegmentUsageRequest> request,
QuerySegmentUsageRequest  284 chrome/browser/history/history_backend.h   void QuerySegmentUsage(scoped_refptr<QuerySegmentUsageRequest> request,
QuerySegmentUsageRequest  413 chrome/browser/history/history_service.cc                   consumer, new history::QuerySegmentUsageRequest(callback),