message: [tf.data] Collect extra TraceMe metadata for padded batch.
diff: @@ -63,7 +63,8 @@ class PaddedBatchDatasetOp::Dataset : public DatasetBase {
  traceme_metadata_(
  {{"batch_size",
  strings::Printf("%lld", static_cast<long long>(batch_size))},
  - {"drop_remainder", drop_remainder ? "true" : "false"}}) {
  + {"drop_remainder", drop_remainder ? "true" : "false"},
  + {"parallel_copy", parallel_copy ? "true" : "false"}}) {
  input_->Ref();
  // NOTE(mrry): Currently we implement "batch up to" semantics. If we could
  