Consolidate ui/events/keycodes/dom[34]/ into .../dom/

ui/events/keycodes/dom3/dom_code.h

Index: ui/events/keycodes/dom3/dom_code.h
diff --git a/ui/events/keycodes/dom3/dom_code.h b/ui/events/keycodes/dom3/dom_code.h
deleted file mode 100644
index a58d9f1e2323341135af2f7b7f2b2358fa4f0563..0000000000000000000000000000000000000000
--- a/ui/events/keycodes/dom3/dom_code.h
+++ /dev/null
@@ -1,18 +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_KEYCODES_DOM3_DOM_CODE_H_
-#define UI_EVENTS_KEYCODES_DOM3_DOM_CODE_H_
-
-namespace ui {
-
-#define USB_KEYMAP(usb, xkb, win, mac, code, id) id = usb
-#define USB_KEYMAP_DECLARATION enum class DomCode
-#include "ui/events/keycodes/dom4/keycode_converter_data.h"
-#undef USB_KEYMAP
-#undef USB_KEYMAP_DECLARATION
-
-}  // namespace ui
-
-#endif  // UI_EVENTS_KEYCODES_DOM3_DOM_CODE_H_