nfc: Add native NFC API definitions.

device/nfc/nfc_tag_technology.cc

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "device/nfc/nfc_tag_technology.h"
+
+#include "device/nfc/nfc_tag.h"
+
+namespace device {
+
+NfcTagTechnology::NfcTagTechnology(NfcTag* tag) : tag_(tag) {
+}
+
+NfcTagTechnology::NfcTagTechnology() : tag_(NULL) {
+}
+
+NfcTagTechnology::~NfcTagTechnology() {
+}
+
+bool NfcNdefTagTechnology::IsSupportedByTag() const {
+  return tag() && (tag()->GetSupportedTechnologies() &
+      NfcTagTechnology::kTechnologyTypeNdef);
+}
+
+NfcNdefTagTechnology::NfcNdefTagTechnology(NfcTag* tag)
+    : NfcTagTechnology(tag) {
+}
+
+NfcNdefTagTechnology::~NfcNdefTagTechnology() {
+}
+
+// static
+NfcNdefTagTechnology* NfcNdefTagTechnology::Create(NfcTag* tag) {
+  // TODO(armansito): Create and return platform-specific implementation
+  // instances here.
+  return NULL;
+}
+
+}  // namespace device