Fix a TODO in GN file

services/service_manager/tests/service_manager/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/service_manifest.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 import("//testing/test.gni")
 
 source_set("service_manager") {
   testonly = true
   sources = [
     "service_manager_unittest.cc",
   ]
 
   deps = [
     ":interfaces",
     "//base",
     "//base/test:test_config",
     "//mojo/common:common_base",
     "//mojo/edk/system",
+    "//services/service_manager/public/cpp",
     "//services/service_manager/public/cpp:service_test_support",
-    "//services/service_manager/public/cpp:sources",
     "//services/service_manager/public/interfaces",
     "//services/service_manager/runner/common",
   ]
 
   data_deps = [
     ":service_manager_unittest_embedder",
     ":service_manager_unittest_target",
   ]
 }
 
@@ skipping 66 matching lines @@
 }
 
 catalog("catalog") {
   embedded_services = [ ":manifest" ]
 
   standalone_services = [
     ":embedder_manifest",
     ":target_manifest",
   ]
 }