Fix a TODO in GN file

components/metrics/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("//testing/test.gni")
 
 static_library("metrics") {
   sources = [
     "call_stack_profile_metrics_provider.cc",
     "call_stack_profile_metrics_provider.h",
@@ skipping 336 matching lines @@
     ":net",
     ":profiler",
     ":test_support",
     ":ui",
     "//base/test:test_support",
     "//components/metrics/public/cpp:call_stack_unit_tests",
     "//components/prefs:test_support",
     "//components/variations",
     "//mojo/public/cpp/bindings",
     "//net:test_support",
-    "//services/service_manager/public/cpp:sources",
+    "//services/service_manager/public/cpp",
     "//testing/gtest",
     "//third_party/zlib:compression_utils",
     "//ui/gfx/geometry",
   ]
 
   if (is_linux) {
     sources += [ "serialization/serialization_utils_unittest.cc" ]
     deps += [ ":serialization" ]
   }
 
@@ skipping 15 matching lines @@
 # Convenience testing target
 test("metrics_unittests") {
   sources = [
     "//components/test/run_all_unittests.cc",
   ]
   deps = [
     ":unit_tests",
     "//components/test:test_support",
   ]
 }