Disable DOMUI menu by default. a part of reverting 6497 feature.

chrome/browser/chromeos/dom_ui/menu_ui.cc

 // Copyright (c) 2010 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.
 
 #include "chrome/browser/chromeos/dom_ui/menu_ui.h"
 
 #include "app/menus/menu_model.h"
 #include "app/resource_bundle.h"
 #include "base/callback.h"
 #include "base/command_line.h"
@@ skipping 631 matching lines @@
     int menu_css_id) {
   return new MenuUIHTMLSource(delegate,
                               source_name,
                               menu_class,
                               menu_source_id,
                               menu_css_id);
 }
 
 // static
 bool MenuUI::IsEnabled() {
-  return !CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kDisableDOMUIMenu);
+  return CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kEnableDOMUIMenu);
 }
 
 ChromeURLDataManager::DataSource* MenuUI::CreateDataSource() {
   return CreateMenuUIHTMLSource(NULL,
                                 chrome::kChromeUIMenu,
                                 "Menu" /* class name */,
                                 kNoExtraResource,
                                 kNoExtraResource);
 }
 
 }  // namespace chromeos