Have PlatformScreen use DisplayConfigurator.

services/ui/ws/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")
 import("//testing/test.gni")
 import("//mojo/public/mojo_application.gni")
 import("//mojo/public/mojo_application_manifest.gni")
 
 source_set("lib") {
@@ skipping 112 matching lines @@
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/gfx/geometry/mojo",
     "//ui/gl",
     "//ui/platform_window",
     "//ui/platform_window:platform_impls",
     "//ui/platform_window/mojo",
   ]
 
   if (use_ozone) {
-    sources -= [
-      "platform_screen_impl.cc",
-      "platform_screen_impl.h",
-    ]
-    sources += [
-      "platform_screen_impl_ozone.cc",
-      "platform_screen_impl_ozone.h",
-    ]
+    if (is_chromeos) {
+      sources -= [
+        "platform_screen_impl.cc",
+        "platform_screen_impl.h",
+      ]
+      sources += [
+        "platform_screen_impl_ozone.cc",
+        "platform_screen_impl_ozone.h",
+      ]
+    }
+
     public_deps += [ "//ui/ozone:ozone" ]
   }
 }
 
 source_set("test_interface") {
   sources = [
     "window_server_test_impl.cc",
     "window_server_test_impl.h",
   ]
 
@@ skipping 94 matching lines @@
 
   data_deps = [
     ":mus_ws_unittests_app_manifest",
   ]
 }
 
 mojo_application_manifest("mus_ws_unittests_app_manifest") {
   application_name = "mus_ws_unittests_app"
   source = "mus_ws_unittests_app_manifest.json"
 }