Use check item for side tab menu.

chrome/browser/browser.cc

Index: chrome/browser/browser.cc
diff --git a/chrome/browser/browser.cc b/chrome/browser/browser.cc
index 3ad027607d02afa1c170aa13748684664ba9e69a..720d857f5a8eec49ff8cc722d175b6cb91fe6255 100644
--- a/chrome/browser/browser.cc
+++ b/chrome/browser/browser.cc
@@ -2357,10 +2357,6 @@ bool Browser::CanCloseTab() const {
   return !watcher || watcher->CanCloseTab(this);
 }
 
-bool Browser::UseVerticalTabs() const {
-  return use_vertical_tabs_.GetValue();
-}
-
 void Browser::ToggleUseVerticalTabs() {
   use_vertical_tabs_.SetValue(!UseVerticalTabs());
   UseVerticalTabsChanged();
@@ -2696,6 +2692,10 @@ void Browser::UpdateDownloadShelfVisibility(bool visible) {
     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);
 }