nfc: Add native NFC API definitions.

device/nfc/nfc_peer.cc

Index: device/nfc/nfc_peer.cc
diff --git a/tools/gn/config_values.cc b/device/nfc/nfc_peer.cc
similarity index 59%
copy from tools/gn/config_values.cc
copy to device/nfc/nfc_peer.cc
index 53466dfd79180b8c211b9d9202a1db73b9166f36..8cf84eedaf2b8f9e35311e566c39660c0f2190e2 100644
--- a/tools/gn/config_values.cc
+++ b/device/nfc/nfc_peer.cc
@@ -2,10 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "tools/gn/config_values.h"
+#include "device/nfc/nfc_peer.h"
 
-ConfigValues::ConfigValues() {
+namespace device {
+
+NfcPeer::NfcPeer() {
 }
 
-ConfigValues::~ConfigValues() {
+NfcPeer::~NfcPeer() {
 }
+
+}  // namespace device