[8/8][Ozone-Dri] Pass DRM FD to GPU process on hotplug event

ui/ozone/platform/dri/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/linux/pkg_config.gni")
 import("//ui/ozone/ozone.gni")
 
 declare_args() {
   use_mesa_platform_null = false
 }
@@ skipping 36 matching lines @@
     "dri_window.h",
     "dri_window_delegate.h",
     "dri_window_delegate_impl.cc",
     "dri_window_delegate_impl.h",
     "dri_window_delegate_manager.cc",
     "dri_window_delegate_manager.h",
     "dri_window_manager.cc",
     "dri_window_manager.h",
     "dri_wrapper.cc",
     "dri_wrapper.h",
+    "drm_device_generator.cc",
+    "drm_device_generator.h",
     "drm_device_manager.cc",
     "drm_device_manager.h",
     "hardware_display_controller.cc",
     "hardware_display_controller.h",
     "hardware_display_plane.cc",
     "hardware_display_plane.h",
     "hardware_display_plane_manager.cc",
     "hardware_display_plane_manager.h",
     "hardware_display_plane_manager_legacy.cc",
     "hardware_display_plane_manager_legacy.h",
@@ skipping 100 matching lines @@
       "//ui/events/ozone:events_ozone_layout",
     ]
 
     public_configs = [ ":libgbm" ]
 
     if (use_mesa_platform_null) {
       defines += [ "USE_MESA_PLATFORM_NULL" ]
     }
   }
 }