message: When default kernel is selected, log to VLOG(1) instead of INFO.
  I missed how frequently default kernels would be selected.
diff: @@ -1275,7 +1275,7 @@ Status FindKernelRegistration(
  }
  if (*reg != nullptr) {
  - LOG(INFO) << "No device-specific kernels found for NodeDef '"
  + VLOG(1) << "No device-specific kernels found for NodeDef '"
  << FormatNodeDefForError(node_name, has_experimental_debug_info,
  experimental_debug_info)
  << "'"
  