Use check item for side tab menu.

chrome/browser/browser.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/browser.h"
 
 #if defined(OS_WIN)
 #include <shellapi.h>
 #include <windows.h>
 #endif  // OS_WIN
@@ skipping 2339 matching lines @@
                        model->GetParentForNewNodes(),  details,
                        BookmarkEditor::SHOW_TREE);
 }
 
 bool Browser::CanCloseTab() const {
   TabCloseableStateWatcher* watcher =
       g_browser_process->tab_closeable_state_watcher();
   return !watcher || watcher->CanCloseTab(this);
 }
 
-bool Browser::UseVerticalTabs() const {
-  return use_vertical_tabs_.GetValue();
-}
-
 void Browser::ToggleUseVerticalTabs() {
   use_vertical_tabs_.SetValue(!UseVerticalTabs());
   UseVerticalTabsChanged();
 }
 
 void Browser::SetToolbarVisibility(bool visible) {
   window()->SetToolbarCollapsedMode(!visible);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ skipping 315 matching lines @@
     GetStatusBubble()->SetURL(
         url, UTF8ToWide(prefs->GetString(prefs::kAcceptLanguages)));
   }
 }
 
 void Browser::UpdateDownloadShelfVisibility(bool visible) {
   if (GetStatusBubble())
     GetStatusBubble()->UpdateDownloadShelfVisibility(visible);
 }
 
+bool Browser::UseVerticalTabs() const {
+  return use_vertical_tabs_.GetValue();
+}
+
 void Browser::ContentsZoomChange(bool zoom_in) {
   ExecuteCommand(zoom_in ? IDC_ZOOM_PLUS : IDC_ZOOM_MINUS);
 }
 
 void Browser::OnContentSettingsChange(TabContents* source) {
   if (source == GetSelectedTabContents())
     window_->GetLocationBar()->UpdateContentSettingsIcons();
 }
 
 void Browser::SetTabContentBlocked(TabContents* contents, bool blocked) {
@@ skipping 1327 matching lines @@
 }
 
 bool Browser::IsPinned(TabContents* source) {
   int index = tabstrip_model_.GetIndexOfTabContents(source);
   if (index == TabStripModel::kNoTab) {
     NOTREACHED() << "IsPinned called for tab not in our strip";
     return false;
   }
   return tabstrip_model_.IsTabPinned(index);
 }