message: Use ScopedUnref in convert_graph.cc to unref resource on error
diff: @@ -212,6 +212,7 @@ tensorflow::Status ConvertCalibGraphToInferGraph(
  return tensorflow::errors::FailedPrecondition(
  "Need to run graph with calibration data first!");
  }
  + tensorflow::core::ScopedUnref calib_sc(cres);
  if (cres->calibrator_) {
  cres->calibrator_->waitAndSetDone();
  cres->thr_->join();
  @@ -228,7 +229,6 @@ tensorflow::Status ConvertCalibGraphToInferGraph(
  return tensorflow::errors::Unknown(
  "Can't get TRTCalibrator from resource manager!");
  }
  - cres->Unref();
  TF_RETURN_IF_ERROR(calib_rm->Cleanup(container_name));
  }
  }
  