Add gcm, nfc and bluetooth to GN build.

device/nfc/nfc.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
+      # GN version: //device/nfc
       'target_name': 'device_nfc',
       'type': 'static_library',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../url/url.gyp:url_lib',
       ],
       'sources': [
+        # Note: file list duplicated in GN build.
         'nfc_adapter.cc',
         'nfc_adapter.h',
         'nfc_adapter_chromeos.cc',
         'nfc_adapter_chromeos.h',
         'nfc_adapter_factory.cc',
         'nfc_adapter_factory.h',
         'nfc_ndef_record.cc',
         'nfc_ndef_record.h',
         'nfc_ndef_record_utils_chromeos.cc',
         'nfc_ndef_record_utils_chromeos.h',
@@ skipping 15 matching lines @@
           'dependencies': [
             '../../build/linux/system.gyp:dbus',
             '../../chromeos/chromeos.gyp:chromeos',
             '../../dbus/dbus.gyp:dbus',
           ]
         }],
       ],
     },
   ],
 }