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

ui/events/keycodes/keyboard_code_conversion_mac.mm

 // Copyright (c) 2012 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 "ui/events/keycodes/keyboard_code_conversion_mac.h"
 
 #include <algorithm>
 
 #import <Carbon/Carbon.h>
 
 #include "base/logging.h"
-#include "ui/events/keycodes/dom4/keycode_converter.h"
+#include "ui/events/keycodes/dom/keycode_converter.h"
 
 namespace ui {
 
 namespace {
 
 // A struct to hold a Windows keycode to Mac virtual keycode mapping.
 struct KeyCodeMap {
   KeyboardCode keycode;
   int macKeycode;
   unichar characterIgnoringAllModifiers;
@@ skipping 524 matching lines @@
       return code;
   }
   return KeyboardCodeFromKeyCode([event keyCode]);
 }
 
 DomCode CodeFromNSEvent(NSEvent* event) {
   return ui::KeycodeConverter::NativeKeycodeToDomCode([event keyCode]);
 }
 
 }  // namespace ui