[2/4]Allow hotplugging of primary DRM device

ui/ozone/platform/drm/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
   use_drm_atomic = false
@@ skipping 118 matching lines @@
   }
 
   source_set("drm_unittests") {
     testonly = true
     sources = [
       "gpu/drm_surface_unittest.cc",
       "gpu/drm_window_unittest.cc",
       "gpu/hardware_display_controller_unittest.cc",
       "gpu/hardware_display_plane_manager_unittest.cc",
       "gpu/screen_manager_unittest.cc",
-      "test/mock_drm_wrapper.cc",
-      "test/mock_drm_wrapper.h",
+      "test/mock_drm_device.cc",
+      "test/mock_drm_device.h",
     ]
 
     deps = [
       "//skia",
       "//testing/gtest",
       "//ui/ozone",
     ]
 
     public_configs = [ ":libdrm" ]
   }
@@ skipping 30 matching lines @@
       "//ui/events/ozone:events_ozone_layout",
     ]
 
     public_configs = [ ":libgbm" ]
 
     if (use_mesa_platform_null) {
       defines += [ "USE_MESA_PLATFORM_NULL" ]
     }
   }
 }