kProtocolUnknown  171 chrome/browser/ui/webui/chromeos/nfc_debug_ui.cc     case NfcTag::kProtocolUnknown:
kProtocolUnknown   47 device/nfc/nfc_tag_chromeos.cc   return NfcTag::kProtocolUnknown;
kProtocolUnknown  101 device/nfc/nfc_tag_chromeos.cc   if (type == NfcTag::kTagTypeUnknown || protocol == kProtocolUnknown) {