chromeos: Remove unused NFC D-Bus client library

device/nfc/nfc_adapter_factory.h

-// Copyright 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.
-
-#ifndef DEVICE_NFC_NFC_ADAPTER_FACTORY_H_
-#define DEVICE_NFC_NFC_ADAPTER_FACTORY_H_
-
-#include "base/callback.h"
-#include "base/memory/ref_counted.h"
-#include "device/nfc/nfc_adapter.h"
-
-namespace device {
-
-// NfcAdapterFactory is a class that contains static methods, which
-// instantiate either a specific NFC adapter, or the generic "default
-// adapter" which may change depending on availability.
-class NfcAdapterFactory {
- public:
-  typedef base::Callback<void(scoped_refptr<NfcAdapter>)> AdapterCallback;
-
-  // Returns true if NFC is available for the current platform.
-  static bool IsNfcAvailable();
-
-  // Returns the shared instance of the default adapter, creating and
-  // initializing it if necessary. |callback| is called with the adapter
-  // instance passed only once the adapter is fully initialized and ready to
-  // use.
-  static void GetAdapter(const AdapterCallback& callback);
-};
-
-}  // namespace device
-
-#endif  // DEVICE_NFC_NFC_ADAPTER_FACTORY_H_