message: Remove empty buckets in latency_stats as it makes the report unreadable. This is also consistent with how SummaryHistoOp in summary_op.cc works.
diff: @@ -47,7 +47,7 @@ class StatsAggregatorImpl : public StatsAggregator {
  Summary::Value* value = out_summary->add_value();
  value->set_tag(name);
  histogram.EncodeToProto(value->mutable_histo(),
  - true /* preserve_zero_buckets */);
  + false /* doesn't preserve zero buckets */);
  }
  }
  