Revert of Finish eliminating PlatformWindowMus

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("//mojo/public/mojo_application.gni")
 import("//mojo/public/mojo_application_manifest.gni")
 import("//testing/test.gni")
 import("//tools/grit/repack.gni")
 
 component("mus") {
   output_name = "ui_views_mus_lib"
 
   sources = [
     "aura_init.cc",
     "aura_init.h",
     "display_converter.cc",
     "display_converter.h",
     "display_list.cc",
     "display_list.h",
     "input_method_mus.cc",
     "input_method_mus.h",
     "mus_export.h",
     "native_widget_mus.cc",
     "native_widget_mus.h",
+    "platform_window_mus.cc",
+    "platform_window_mus.h",
     "screen_mus.cc",
     "screen_mus.h",
     "screen_mus_delegate.h",
     "surface_binding.cc",
     "surface_binding.h",
     "surface_context_factory.cc",
     "surface_context_factory.h",
     "window_manager_connection.cc",
     "window_manager_connection.h",
     "window_manager_constants_converters.cc",
@@ skipping 38 matching lines @@
     "//ui/events",
     "//ui/events:events_base",
     "//ui/events/devices",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/gl",
     "//ui/mojo/display",
     "//ui/mojo/ime:interfaces_cpp_sources",
     "//ui/native_theme",
     "//ui/platform_window",
-    "//ui/platform_window/stub",
     "//ui/views",
     "//ui/wm",
   ]
 
   if (is_linux && !is_android) {
     deps += [ "//components/font_service/public/cpp" ]
     data_deps = [
       "//components/font_service",
     ]
   }
@@ skipping 206 matching lines @@
 }
 
 group("for_component") {
   public_deps = [
     ":mus",
   ]
   deps = [
     "//mojo/gles2",
   ]
 }