message: clang tidy cleanup
diff: @@ -584,7 +584,7 @@ class OneShotIteratorOp : public AsyncOpKernel {
  return Status::OK();
  }
  - void ProduceOutput(OpKernelContext* ctx, DoneCallback done) {
  + void ProduceOutput(OpKernelContext* ctx, const DoneCallback& done) {
  Tensor* handle;
  OP_REQUIRES_OK_ASYNC(ctx, ctx->allocate_output(0, TensorShape({}), &handle),
  done);
  