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

ui/events/ozone/layout/layout_util.h

Index: ui/events/ozone/layout/layout_util.h
diff --git a/ui/events/ozone/layout/layout_util.h b/ui/events/ozone/layout/layout_util.h
deleted file mode 100644
index 84d9d1ddc8e65090f05df474b7e67cffc45b7657..0000000000000000000000000000000000000000
--- a/ui/events/ozone/layout/layout_util.h
+++ /dev/null
@@ -1,24 +0,0 @@
-// 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.
-
-#ifndef UI_EVENTS_OZONE_LAYOUT_LAYOUT_UTIL_H_
-#define UI_EVENTS_OZONE_LAYOUT_LAYOUT_UTIL_H_
-
-// TODO(kpschoedel): consider moving this out of Ozone.
-
-#include "base/strings/string16.h"
-#include "ui/events/keycodes/keyboard_codes.h"
-#include "ui/events/ozone/layout/events_ozone_layout_export.h"
-
-namespace ui {
-
-enum class DomKey;
-
-// Returns the ui::EventFlags value associated with a modifier key,
-// or 0 (EF_NONE) if the key is not a modifier.
-EVENTS_OZONE_LAYOUT_EXPORT int ModifierDomKeyToEventFlag(DomKey key);
-
-}  // namespace ui
-
-#endif  // UI_EVENTS_OZONE_LAYOUT_LAYOUT_UTIL_H_