Cleanup: Remove unneeded includes of pref_names.h

chrome/browser/ui/tabs/tab_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/ui/tabs/tab_menu_model.h"
 
 #include "base/command_line.h"
 #include "chrome/browser/tabs/tab_strip_model.h"
 #include "chrome/common/chrome_switches.h"
-#include "chrome/common/pref_names.h"
 #include "grit/generated_resources.h"
 
 TabMenuModel::TabMenuModel(menus::SimpleMenuModel::Delegate* delegate,
                            bool is_pinned)
     : menus::SimpleMenuModel(delegate) {
   Build(is_pinned);
 }
 
 // static
 bool TabMenuModel::AreVerticalTabsEnabled() {
@@ skipping 24 matching lines @@
   AddSeparator();
   AddItemWithStringId(TabStripModel::CommandRestoreTab, IDS_RESTORE_TAB);
   AddItemWithStringId(TabStripModel::CommandBookmarkAllTabs,
                       IDS_TAB_CXMENU_BOOKMARK_ALL_TABS);
   if (AreVerticalTabsEnabled()) {
     AddSeparator();
     AddCheckItemWithStringId(TabStripModel::CommandUseVerticalTabs,
                              IDS_TAB_CXMENU_USE_VERTICAL_TABS);
   }
 }