[WIP][Ozone] Support external touchscreens

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")
 
 pkg_config("libdrm") {
   packages = [ "libdrm" ]
 }
@@ skipping 40 matching lines @@
     "hardware_display_controller.h",
     "native_display_delegate_dri.cc",
     "native_display_delegate_dri.h",
     "overlay_plane.cc",
     "overlay_plane.h",
     "scoped_drm_types.cc",
     "scoped_drm_types.h",
     "screen_manager.cc",
     "screen_manager.h",
     "scanout_buffer.h",
+    "touch_converter.cc",
+    "touch_converter.h",
     "virtual_terminal_manager.cc",
     "virtual_terminal_manager.h",
   ]
 
   deps = [
     "//base",
     "//skia",
     "//ipc",
     "//ui/base",
     "//ui/display/types",
@@ skipping 70 matching lines @@
       "//base",
       "//skia",
       "//ui/events/ozone:events_ozone_evdev",
     ]
 
     public_configs = [
       ":libgbm",
     ]
   }
 }