Fix a TODO in GN file

components/filesystem/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("//services/catalog/public/tools/catalog.gni")
 import("//services/service_manager/public/cpp/service.gni")
 import("//services/service_manager/public/service_manifest.gni")
 import("//services/service_manager/public/tools/test/service_test.gni")
 import("//testing/test.gni")
 
@@ skipping 57 matching lines @@
   ]
 
   catalog = ":filesystem_service_unittests_catalog"
 
   deps = [
     "//base",
     "//components/filesystem/public/interfaces",
     "//mojo/common",
     "//mojo/public/cpp/bindings",
     "//mojo/public/cpp/system",
+    "//services/service_manager/public/cpp",
     "//services/service_manager/public/cpp:service_test_support",
-    "//services/service_manager/public/cpp:sources",
   ]
 
   data_deps = [
     ":filesystem",
   ]
 }
 
 service_manifest("test_manifest") {
   name = "filesystem_service_unittests"
   source = "test_manifest.json"
 }
 
 catalog("filesystem_service_unittests_catalog") {
   embedded_services = [ ":test_manifest" ]
   standalone_services = [ ":manifest" ]
 }