Remove xkbcommon support.

ui/events/ozone/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/features.gni")
-import("//build/config/linux/pkg_config.gni")
 import("//build/config/ui.gni")
-import("//ui/events/xkb.gni")
-
-if (use_xkbcommon) {
-  pkg_config("xkbcommon") {
-    packages = [ "xkbcommon" ]
-  }
-}
 
 component("events_ozone") {
   sources = [
     "device/device_event.cc",
     "device/device_event.h",
     "device/device_event_observer.h",
     "device/device_manager.cc",
     "device/device_manager.h",
     "device/device_manager_manual.cc",
     "device/device_manager_manual.h",
@@ skipping 92 matching lines @@
     "//ui/events:events_base",
     "//ui/events/devices",
     "//ui/events/platform",
     "//ui/gfx",
     "//ui/ozone:ozone_base",
   ]
 
   public_configs = [ ":evdev" ]
 }
 
-config("events_ozone_layout_config") {
-  if (use_xkbcommon) {
-    defines = [ "USE_XKBCOMMON" ]
-  }
-}
-
 component("events_ozone_layout") {
   sources = [
     "layout/events_ozone_layout_export.h",
     "layout/keyboard_layout_engine.h",
     "layout/keyboard_layout_engine_manager.cc",
     "layout/keyboard_layout_engine_manager.h",
     "layout/layout_util.cc",
     "layout/layout_util.h",
     "layout/no/no_keyboard_layout_engine.cc",
     "layout/no/no_keyboard_layout_engine.h",
     "layout/stub/stub_keyboard_layout_engine.cc",
     "layout/stub/stub_keyboard_layout_engine.h",
   ]
 
   defines = [ "EVENTS_OZONE_LAYOUT_IMPLEMENTATION" ]
 
   deps = [
     "//base",
     "//ui/events:dom_keycode_converter",
     "//ui/events:events_base",
     "//ui/ozone:ozone_base",
   ]
-
-  public_configs = [ ":events_ozone_layout_config" ]
 }