[KeyboardEvent] Use DOM |code| rather than Windows-based key code

ui/events/ozone/events_ozone.gyp

 # 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': {
     'chromium_code': 1,
   },
   'targets': [{
     'target_name': 'events_ozone',
@@ skipping 132 matching lines @@
       '../events.gyp:events_base',
     ],
     'defines': [
       'EVENTS_OZONE_LAYOUT_IMPLEMENTATION',
     ],
     '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',
     ],
     'conditions': [
       ['use_xkbcommon==1', {
         'dependencies': [
           '../../../build/linux/system.gyp:xkbcommon',
         ],
         'defines': [
           'USE_XKBCOMMON',
         ],
         'direct_dependent_settings': {
           'defines': [
             'USE_XKBCOMMON',
           ],
         },
         'sources': [
           'layout/xkb/xkb.h',
           'layout/xkb/xkb_evdev_codes.cc',
           'layout/xkb/xkb_evdev_codes.h',
           'layout/xkb/xkb_key_code_converter.h',
-          'layout/xkb/xkb_keyboard_code_conversion.cc',
-          'layout/xkb/xkb_keyboard_code_conversion.h',
           'layout/xkb/xkb_keyboard_layout_engine.cc',
           'layout/xkb/xkb_keyboard_layout_engine.h',
           'layout/xkb/xkb_keysym.h',
           'layout/xkb/scoped_xkb.h',
         ],
       }],
     ],
   }]
 }