411   HistogramBase* existing = GetOrCreateStatisticsRecorderHistogram(histogram);  in MergeHistogramDeltaToStatisticsRecorder()  local
412   if (!existing) {  in MergeHistogramDeltaToStatisticsRecorder()
423   existing->AddSamples(*histogram->SnapshotDelta());  in MergeHistogramDeltaToStatisticsRecorder()
430   HistogramBase* existing = GetOrCreateStatisticsRecorderHistogram(histogram);  in MergeHistogramFinalDeltaToStatisticsRecorder()  local
431   if (!existing) {  in MergeHistogramFinalDeltaToStatisticsRecorder()
439   existing->AddSamples(*histogram->SnapshotFinalDelta());  in MergeHistogramFinalDeltaToStatisticsRecorder()
634   HistogramBase* existing =  in GetOrCreateStatisticsRecorderHistogram()  local
636   if (existing)  in GetOrCreateStatisticsRecorderHistogram()
637     return existing;  in GetOrCreateStatisticsRecorderHistogram()
646   existing = DeserializeHistogramInfo(&iter);  in GetOrCreateStatisticsRecorderHistogram()
647   if (!existing)  in GetOrCreateStatisticsRecorderHistogram()
651   DCHECK_EQ(0, existing->flags() & HistogramBase::kIPCSerializationSourceFlag);  in GetOrCreateStatisticsRecorderHistogram()
653   return StatisticsRecorder::RegisterOrDeleteDuplicate(existing);  in GetOrCreateStatisticsRecorderHistogram()
761   size_t existing = StatisticsRecorder::GetHistogramCount();  in Set()  local
763   DVLOG_IF(1, existing)  in Set()
764       << existing << " histograms were created before persistence was enabled.";  in Set()