XXX test gn format everything

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.
 
 # GYP version: components/metrics.gypi:metrics
 source_set("metrics") {
   sources = [
     "clean_exit_beacon.cc",
     "clean_exit_beacon.h",
     "client_info.cc",
@@ skipping 130 matching lines @@
 
 if (is_linux) {
   # GYP version: components/metrics.gypi:metrics_serialization
   source_set("serialization") {
     sources = [
       "serialization/serialization_utils.cc",
       "serialization/serialization_utils.h",
       "serialization/metric_sample.cc",
       "serialization/metric_sample.h",
     ]
-    deps = [ "//base" ]
+    deps = [
+      "//base",
+    ]
   }
 }
 
 source_set("unit_tests") {
   testonly = true
   sources = [
     "compression_utils_unittest.cc",
     "daily_event_unittest.cc",
     "machine_id_provider_win_unittest.cc",
     "metrics_hashes_unittest.cc",
@@ skipping 10 matching lines @@
     ":metrics",
     ":profiler",
     ":test_support",
     "//base:prefs_test_support",
     "//base/test:test_support",
     "//components/variations",
     "//content/public/common",
     "//testing/gtest",
   ]
 }
-
 # TODO(GYP): metrics_chromeos