[PoC] Reformat all BUILD.gn and *.gni files with new gn.

components/signin/core/browser/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.
 
 source_set("browser") {
   sources = [
     "about_signin_internals.cc",
     "about_signin_internals.h",
     "account_fetcher_service.cc",
     "account_fetcher_service.h",
@@ skipping 50 matching lines @@
     "webdata/token_service_table.cc",
     "webdata/token_service_table.h",
     "webdata/token_web_data.cc",
     "webdata/token_web_data.h",
   ]
 
   configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
   deps = [
     "//base",
-    "//crypto",
-    "//google_apis",
-    "//net",
-    "//sql",
-    "//third_party/icu",
-    "//components/signin/core/common",
     "//components/content_settings/core/browser",
     "//components/content_settings/core/common",
     "//components/google/core/browser",
     "//components/invalidation/public",
     "//components/keyed_service/core",
     "//components/metrics",
     "//components/os_crypt",
+    "//components/signin/core/account_id",
+    "//components/signin/core/common",
     "//components/webdata/common",
-    "//components/signin/core/account_id",
+    "//crypto",
+    "//google_apis",
+    "//net",
+    "//sql",
+    "//third_party/icu",
   ]
 
   if (is_chromeos) {
     sources -= [
       "signin_manager.cc",
       "signin_status_metrics_provider.cc",
       "signin_status_metrics_provider_delegate.cc",
     ]
   }
 
@@ skipping 40 matching lines @@
 
   deps = [
     ":test_support",
     "//testing/gmock",
   ]
 
   if (is_chromeos) {
     sources -= [ "signin_status_metrics_provider_unittest.cc" ]
   }
 }