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diff --git a/chromium/device/nfc/nfc_tag_technology_chromeos.h b/chromium/device/nfc/nfc_tag_technology_chromeos.h
new file mode 100644
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+++ b/chromium/device/nfc/nfc_tag_technology_chromeos.h
@@ -0,0 +1,87 @@
+// Copyright 2014 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.
+
+#ifndef DEVICE_NFC_NFC_TAG_TECHNOLOGY_CHROMEOS_H_
+#define DEVICE_NFC_NFC_TAG_TECHNOLOGY_CHROMEOS_H_
+
+#include <map>
+
+#include "base/memory/weak_ptr.h"
+#include "base/observer_list.h"
+#include "chromeos/dbus/nfc_record_client.h"
+#include "device/nfc/nfc_tag_technology.h"
+
+namespace chromeos {
+
+class NfcTagChromeOS;
+
+// The NfcNdefTagTechnologyChromeOS class implements
+// device::NfcNdefTagTechnology for the Chrome OS platform. The lifetime of an
+// instance of this class must be tied to an instance of NfcTagChromeOS.
+// Instances of this class must never outlast the owning NfcTagChromeOS
+// instance.
+class NfcNdefTagTechnologyChromeOS : public device::NfcNdefTagTechnology,
+                                     public NfcRecordClient::Observer {
+ public:
+  virtual ~NfcNdefTagTechnologyChromeOS();
+
+  // device::NfcNdefTagTechnology overrides.
+  virtual void AddObserver(device::NfcNdefTagTechnology::Observer* observer)
+    OVERRIDE;
+  virtual void RemoveObserver(device::NfcNdefTagTechnology::Observer* observer)
+    OVERRIDE;
+  virtual const device::NfcNdefMessage& GetNdefMessage() const OVERRIDE;
+  virtual void WriteNdef(const device::NfcNdefMessage& message,
+                         const base::Closure& callback,
+                         const ErrorCallback& error_callback) OVERRIDE;
+
+  // NfcRecordClient::Observer overrides.
+  virtual void RecordAdded(const dbus::ObjectPath& object_path) OVERRIDE;
+  virtual void RecordRemoved(const dbus::ObjectPath& object_path) OVERRIDE;
+  virtual void RecordPropertiesReceived(
+      const dbus::ObjectPath& object_path) OVERRIDE;
+
+ private:
+  friend class NfcTagChromeOS;
+
+  // Mapping from D-Bus object paths to NfcNdefRecord objects.
+  typedef std::map<dbus::ObjectPath, device::NfcNdefRecord*> NdefRecordMap;
+
+  explicit NfcNdefTagTechnologyChromeOS(NfcTagChromeOS* tag);
+
+  // Called by dbus:: on completion of the D-Bus method call to write an NDEF.
+  void OnWriteNdefMessage(const base::Closure& callback);
+  void OnWriteNdefMessageError(const ErrorCallback& error_callback,
+                               const std::string& error_name,
+                               const std::string& error_message);
+
+  // Creates a record object for the record with object path |object_path| and
+  // notifies the observers, if a record object did not already exist for it.
+  void AddRecord(const dbus::ObjectPath& object_path);
+
+  // A map containing the NDEF records that were received from the tag.
+  NdefRecordMap records_;
+
+  // Message instance that contains pointers to all created records that are
+  // in |records_|. This is mainly used as the cached return value for
+  // GetNdefMessage().
+  device::NfcNdefMessage message_;
+
+  // List of observers interested in event notifications from us.
+  ObserverList<device::NfcNdefTagTechnology::Observer> observers_;
+
+  // D-Bus object path of the remote tag or device that this object operates
+  // on.
+  dbus::ObjectPath object_path_;
+
+  // Note: This should remain the last member so it'll be destroyed and
+  // invalidate its weak pointers before any other members are destroyed.
+  base::WeakPtrFactory<NfcNdefTagTechnologyChromeOS> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(NfcNdefTagTechnologyChromeOS);
+};
+
+}  // namespace chromeos
+
+#endif  // DEVICE_NFC_NFC_TAG_TECHNOLOGY_CHROMEOS_H_