XXX test gn format everything

ui/compositor/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("compositor") {
   sources = [
     "closure_animation_observer.cc",
     "closure_animation_observer.h",
@@ skipping 114 matching lines @@
     configs += [ "//build/config/linux:x11" ]
     deps += [ "//ui/gfx/x" ]
   }
 
   if (use_ozone) {
     sources += [ "test/test_compositor_host_ozone.cc" ]
   } else if (use_x11) {
     sources += [ "test/test_compositor_host_x11.cc" ]
   }
 }
-
 # TODO(GYP) enable this when all dependencies are complete and it links.
 #test("compositor_unittests") {
 #  sources = [
 #    "layer_animation_element_unittest.cc",
 #    "layer_animation_sequence_unittest.cc",
 #    "layer_animator_unittest.cc",
 #    "layer_owner_unittest.cc",
 #    "layer_unittest.cc",
 #    "run_all_unittests.cc",
 #    "transform_animation_curve_adapter_unittest.cc",
@@ skipping 13 matching lines @@
 #    "//ui/gfx",
 #    "//ui/gfx/geometry",
 #    "//ui/gl",
 #    "//ui/resources",
 #  ]
 #
 #  if (is_linux) {
 #    deps += [ "//third_party/mesa:osmesa" ]
 #  }
 #}