message: Add back some public interface methods.
diff: @@ -95,6 +95,13 @@ class StatSummarizer {
  num_stats);
  }
  + int num_runs() const { return stats_calculator_->num_runs(); }
  +
  + // Returns stats of total microseconds spent by all nodes in each run.
  + const Stat<int64_t>& run_total_us() const {
  + return stats_calculator_->run_total_us();
  + }
  +
  private:
  void Validate(const std::vector<TensorDescription>* outputs,
  const NodeExecStats& ns) const;
  