Move PlatformDisplayDefault into it's own file.

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("//services/service_manager/public/cpp/service.gni")
 import("//services/service_manager/public/service_manifest.gni")
 
 static_library("lib") {
@@ skipping 37 matching lines @@
     "gpu_service_proxy.h",
     "gpu_service_proxy_delegate.h",
     "modal_window_controller.cc",
     "modal_window_controller.h",
     "mus_gpu_memory_buffer_manager.cc",
     "mus_gpu_memory_buffer_manager.h",
     "operation.cc",
     "operation.h",
     "platform_display.cc",
     "platform_display.h",
+    "platform_display_default.cc",
+    "platform_display_default.h",
     "platform_display_delegate.h",
     "platform_display_factory.h",
     "platform_display_init_params.cc",
     "platform_display_init_params.h",
     "scheduled_animation_group.cc",
     "scheduled_animation_group.h",
     "server_window.cc",
     "server_window.h",
     "server_window_compositor_frame_sink_manager.cc",
     "server_window_compositor_frame_sink_manager.h",
@@ skipping 193 matching lines @@
 
   data_deps = [
     ":mus_ws_unittests_app_manifest",
   ]
 }
 
 service_manifest("mus_ws_unittests_app_manifest") {
   name = "mus_ws_unittests_app"
   source = "mus_ws_unittests_app_manifest.json"
 }