Work on GN build, mostly in //ui

ui/aura/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("aura") {
   sources = [
     "client/aura_constants.cc",
     "client/aura_constants.h",
@@ skipping 122 matching lines @@
     ]
 
     # TODO(GYP) enable when these targets exist.
     #deps += [
     #  "//ui/events/ozone",
     #  "//ui/ozone",
     #]
   }
 }
 
-source_set("aura_test_support") {
+source_set("test_support") {
   sources = [
     "test/aura_test_base.cc",
     "test/aura_test_base.h",
     "test/aura_test_helper.cc",
     "test/aura_test_helper.h",
     "test/aura_test_utils.cc",
     "test/aura_test_utils.h",
     "test/env_test_helper.h",
     "test/event_generator.cc",
     "test/event_generator.h",
@@ skipping 142 matching lines @@
 #    ]
 #  }
 #
 #  if (is_linux) { # && use_allocator != "none") {
 #    deps += [
 #      # See http://crbug.com/162998#c4 for why this is needed.
 #      "//base/allocator",
 #    ]
 #  }
 #}