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

ui/ozone/platform/dri/dri.gypi

 # 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.
 
 {
   'variables': {
     'internal_ozone_platform_deps': [
       'ozone_platform_dri',
     ],
     'internal_ozone_platform_unittest_deps': [
@@ skipping 58 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 33 matching lines @@
           'hardware_display_controller_unittest.cc',
           'hardware_display_plane_manager_unittest.cc',
           'screen_manager_unittest.cc',
           'test/mock_dri_wrapper.cc',
           'test/mock_dri_wrapper.h',
         ],
       },
     },
   ],
 }