AddSamplesFromPickle  464 base/metrics/histogram.h   virtual bool AddSamplesFromPickle(PickleIterator* iter) OVERRIDE;
AddSamplesFromPickle  122 base/metrics/histogram_base.h   virtual bool AddSamplesFromPickle(PickleIterator* iter) = 0;
AddSamplesFromPickle   30 base/metrics/histogram_delta_serialization.cc   histogram->AddSamplesFromPickle(iter);
AddSamplesFromPickle   73 base/metrics/sparse_histogram.h   virtual bool AddSamplesFromPickle(PickleIterator* iter) OVERRIDE;