[1/2][Ozone-Drm] Refactor GPU display management

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 17 matching lines @@
     "gpu/drm_buffer.cc",
     "gpu/drm_buffer.h",
     "gpu/drm_console_buffer.cc",
     "gpu/drm_console_buffer.h",
     "gpu/drm_device.cc",
     "gpu/drm_device.h",
     "gpu/drm_device_generator.cc",
     "gpu/drm_device_generator.h",
     "gpu/drm_device_manager.cc",
     "gpu/drm_device_manager.h",
-    "gpu/drm_display_mode.cc",
-    "gpu/drm_display_mode.h",
-    "gpu/drm_display_snapshot.cc",
-    "gpu/drm_display_snapshot.h",
+    "gpu/drm_display.cc",
+    "gpu/drm_display.h",
     "gpu/drm_gpu_display_manager.cc",
     "gpu/drm_gpu_display_manager.h",
     "gpu/drm_gpu_platform_support.cc",
     "gpu/drm_gpu_platform_support.h",
     "gpu/drm_surface.cc",
     "gpu/drm_surface.h",
     "gpu/drm_vsync_provider.cc",
     "gpu/drm_vsync_provider.h",
     "gpu/drm_window.cc",
     "gpu/drm_window.h",
@@ skipping 131 matching lines @@
       "//ui/events/ozone:events_ozone_layout",
     ]
 
     public_configs = [ ":libgbm" ]
 
     if (use_mesa_platform_null) {
       defines += [ "USE_MESA_PLATFORM_NULL" ]
     }
   }
 }