Changes DesktopNativeWidgetAura to not call InitHost or window->Show()

ui/views/mus/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/features.gni")
 import("//build/config/ui.gni")
 import("//services/service_manager/public/cpp/service.gni")
 import("//services/service_manager/public/service_manifest.gni")
 import("//testing/test.gni")
 import("//tools/grit/repack.gni")
@@ skipping 257 matching lines @@
 
   data_deps = [
     "//ui/resources:ui_test_pak_data",
   ]
 }
 
 test("views_aura_mus_unittests") {
   testonly = true
 
   sources = [
+    "desktop_window_tree_host_mus_unittest.cc",
     "pointer_watcher_event_router2_unittest.cc",
     "run_all_unittests_aura_mus.cc",
     "screen_mus_unittest.cc",
   ]
 
   configs += [ "//build/config:precompiled_headers" ]
 
   deps = [
     ":mus",
     ":test_support_aura_mus",
@@ skipping 118 matching lines @@
 
 service_manifest("unittests_aura_manifest") {
   name = "views_aura_mus_unittests"
   source = "unittests_aura_manifest.json"
 }
 
 service_manifest("interactive_ui_tests_manifest") {
   name = "views_mus_interactive_ui_tests"
   source = "interactive_ui_tests_manifest.json"
 }