Use check item for side tab menu.

chrome/browser/wrench_menu_model.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/wrench_menu_model.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "app/l10n_util.h"
@@ skipping 291 matching lines @@
   AddItemWithStringId(IDC_SHOW_DOWNLOADS, IDS_SHOW_DOWNLOADS);
   AddSeparator();
 
 #if defined(OS_MACOSX)
   AddItemWithStringId(IDC_OPTIONS, IDS_PREFERENCES_MAC);
 #else
   AddItemWithStringId(IDC_OPTIONS, IDS_OPTIONS);
 #endif
 
 #if defined(OS_CHROMEOS)
-  AddItemWithStringId(IDC_TOGGLE_VERTICAL_TABS,
-                      IDS_TAB_CXMENU_USE_VERTICAL_TABS);
+  AddCheckItemWithStringId(IDC_TOGGLE_VERTICAL_TABS,
+                           IDS_TAB_CXMENU_USE_VERTICAL_TABS);
 #endif
 
   // On Mac, there is no About item unless it is replaced with the update
   // available notification.
   if (browser_defaults::kShowAboutMenuItem ||
       Singleton<UpgradeDetector>::get()->notify_upgrade()) {
     AddItem(IDC_ABOUT,
             l10n_util::GetStringFUTF16(
                 IDS_ABOUT,
                 l10n_util::GetStringUTF16(IDS_PRODUCT_NAME)));
@@ skipping 65 matching lines @@
   }
   return l10n_util::GetStringFUTF16(
       IDS_ABOUT, l10n_util::GetStringUTF16(IDS_PRODUCT_NAME));
 }
 
 bool WrenchMenuModel::IsDynamicItem(int index) const {
   int command_id = GetCommandIdAt(index);
   return command_id == IDC_SYNC_BOOKMARKS ||
          command_id == IDC_ABOUT;
 }