message: Fix OP_REQUIRES to be OP_REQUIRES_ASYNC
diff: @@ -169,9 +169,10 @@ Rendezvous::DoneCallback make_recv_callback(OpKernelContext* ctx,
  } // namespace
  void RecvOp::ComputeAsync(OpKernelContext* ctx, DoneCallback done) {
  - OP_REQUIRES(
  + OP_REQUIRES_ASYNC(
  ctx, ctx->rendezvous() != nullptr,
  - errors::Internal("Op kernel context needs to provide a rendezvous."));
  + errors::Internal("Op kernel context needs to provide a rendezvous."),
  + done);
  Rendezvous::Args args;
  args.device_context = ctx->op_device_context();
  