167     error->CopyFrom(error_);  in Start()
183   error_.Reset();  in Stop()
200   error.CopyFrom(error_);  in HandleCompletion()
209     error_.Reset();  in HandleCompletion()
254         error_.Populate(Error::kOperationFailed, kErrorNoData);  in ReceiveDNSReply()
257         error_.Populate(Error::kOperationFailed, kErrorFormErr);  in ReceiveDNSReply()
260         error_.Populate(Error::kOperationFailed, kErrorServerFail);  in ReceiveDNSReply()
263         error_.Populate(Error::kOperationFailed, kErrorNotFound);  in ReceiveDNSReply()
266         error_.Populate(Error::kOperationFailed, kErrorNotImp);  in ReceiveDNSReply()
269         error_.Populate(Error::kOperationFailed, kErrorRefused);  in ReceiveDNSReply()
275         error_.Populate(Error::kOperationFailed, kErrorBadQuery);  in ReceiveDNSReply()
278         error_.Populate(Error::kOperationFailed, kErrorNetRefused);  in ReceiveDNSReply()
281         error_.Populate(Error::kOperationTimeout, kErrorTimedOut);  in ReceiveDNSReply()
284         error_.Populate(Error::kOperationFailed, kErrorUnknown);  in ReceiveDNSReply()
371     error_.Populate(Error::kOperationTimeout, kErrorTimedOut);  in RefreshHandles()