message: Apply cl/347541110 to the soon-to-be refactored custom device support
  Just want to make sure I don't clobber the logic when the refactor gets checked in.
diff: @@ -58,7 +58,10 @@ int CustomDeviceTensorHandle::DeviceId(Status* status) const {
  AbstractTensorInterface* CustomDeviceTensorHandle::Resolve(Status* status) {
  core::RefCountPtr<ImmediateExecutionTensorHandle> copied_off(
  context_->CopyTensorHandleToDevice(
  - this, "/job:localhost/replica:0/task:0/device:CPU:0", status));
  + this,
  + DeviceNameUtils::ParsedNameToString(context_->HostCPUParsedName())
  + .c_str(),
  + status));
  if (!status->ok()) {
  return nullptr;
  }
  