Fix a TODO in GN file

services/service_manager/tests/BUILD.gn

 # Copyright 2016 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/tools/test/service_test.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//testing/test.gni")
 
@@ skipping 38 matching lines @@
 
 source_set("util") {
   sources = [
     "util.cc",
     "util.h",
   ]
   deps = [
     "//base",
     "//base:base_static",
     "//mojo/edk/system",
-    "//services/service_manager/public/cpp:sources",
+    "//services/service_manager/public/cpp",
     "//services/service_manager/public/interfaces",
     "//services/service_manager/runner/common",
   ]
 }
 
 catalog("service_manager_unittests_catalog") {
   catalog_deps = [
     "//services/service_manager/background/tests:catalog",
     "//services/service_manager/tests/connect:catalog",
     "//services/service_manager/tests/lifecycle:catalog",
     "//services/service_manager/tests/service_manager:catalog",
     "//services/service_manager/tests/shutdown:catalog",
   ]
 }