message: [tf.lite] Use in-process conversion when the new converter is used
  Out-of-process conversion was a workaround for the legacy converter,
  which would generally crash the process when conversion failed. However,
  out-of-process conversion also adds a good deal of complexity, so avoid
  it when using the new conversion backend.
diff: @@ -169,9 +169,10 @@ def toco_convert_protos(model_flags_str,
  RuntimeError: When conversion fails, an exception is raised with the error
  message embedded.
  """
  - # TODO(aselle): When toco does not use fatal errors for failure, we can
  - # switch this on.
  - if not _toco_from_proto_bin:
  + # Historically, TOCO conversion failures would trigger a crash, so we would
  + # attempt to run the converter out-of-process. The MLIR conversion pipeline
  + # surfaces errors instead, and can be safely run in-process.
  + if enable_mlir_converter or not _toco_from_proto_bin:
  try:
  model_str = wrap_toco.wrapped_toco_convert(model_flags_str,
  toco_flags_str, input_data_str,
  