XXX test gn format everything

mojo/services/public/cpp/view_manager/lib/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")
 
 source_set("run_unittests") {
   testonly = true
   sources = [
     "view_manager_test_suite.cc",
     "view_manager_test_suite.h",
     "view_manager_unittests.cc",
   ]
 
   deps = [
     "//base",
     "//base/test:test_support",
   ]
 
   if (use_x11) {
-    deps += ["//ui/gfx/x"]
+    deps += [ "//ui/gfx/x" ]
   }
 }