[webnfc] Implement push() method in blink nfc module.

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': [
     {
@@ skipping 35 matching lines @@
             '../../build/linux/system.gyp:dbus',
             '../../chromeos/chromeos.gyp:chromeos',
             '../../dbus/dbus.gyp:dbus',
           ]
         }],
       ],
     },
     {
       'target_name': 'device_nfc_mojo_bindings',
       'type': 'static_library',
+      'variables': {
+        'mojom_variant': 'wtf',
+        'for_blink': 'true',
+      },
       'includes': [
         '../../mojo/mojom_bindings_generator.gypi',
       ],
       'sources': [
         'nfc.mojom',
       ],
     },
   ],
 }