XXX test gn format everything

ui/native_theme/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("//build/config/ui.gni")
 
 component("native_theme") {
   sources = [
     "common_theme.cc",
     "common_theme.h",
@@ skipping 22 matching lines @@
     ]
 
     if (is_win) {
       sources += [
         "native_theme_aurawin.cc",
         "native_theme_aurawin.h",
       ]
     }
   }
 
-  defines = [
-    "NATIVE_THEME_IMPLEMENTATION",
-  ]
+  defines = [ "NATIVE_THEME_IMPLEMENTATION" ]
 
   deps = [
     "//base",
     "//base/third_party/dynamic_annotations",
     "//skia",
     "//ui/base",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/resources",
   ]
 }