[webnfc] Add default implementation for nfc mojo service.

content/browser/BUILD.gn

 # 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.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//content/browser/browser.gni")
 import("//media/media_options.gni")
 
 source_set("browser") {
@@ skipping 38 matching lines @@
     "//content/browser/devtools:resources",
     "//content/browser/notifications:notification_proto",
     "//content/browser/service_worker:service_worker_proto",
     "//content/browser/speech/proto",
     "//content/common",
     "//content/public/common:common_sources",
     "//content/public/common:mojo_bindings",
     "//crypto",
     "//device/battery",
     "//device/bluetooth",
+    "//device/nfc:nfc_mojo",
     "//device/vibration",
     "//gin",
     "//google_apis",
     "//gpu",
     "//gpu/command_buffer/client:gles2_implementation",
     "//ipc/mojo",
     "//media",
     "//media/gpu/ipc/client",
     "//media/midi",
     "//mojo/common",
@@ skipping 465 matching lines @@
 
 # See comment at the top of //content/BUILD.gn for how this works.
 group("for_content_tests") {
   visibility = [ "//content/test/*" ]
   if (!is_component_build) {
     public_deps = [
       ":browser",
     ]
   }
 }