mash: Cleanup ash shelf application menu code.

chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item_tab.cc

Index: chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item_tab.cc
diff --git a/chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item_tab.cc b/chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item_tab.cc
index e563f2457f919c1dff07753784286053c6ce4141..956b6216a793b949a58091253d637f70ea185fba 100644
--- a/chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item_tab.cc
+++ b/chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item_tab.cc
@@ -15,15 +15,9 @@
 ChromeLauncherAppMenuItemTab::ChromeLauncherAppMenuItemTab(
     const base::string16 title,
     const gfx::Image* icon,
-    content::WebContents* content,
-    bool has_leading_separator)
-    : ChromeLauncherAppMenuItem(title, icon, has_leading_separator),
-      content::WebContentsObserver(content) {
-}
-
-bool ChromeLauncherAppMenuItemTab::IsEnabled() const {
-  return true;
-}
+    content::WebContents* content)
+    : ash::ShelfApplicationMenuItem(title, icon),
+      content::WebContentsObserver(content) {}
 
 void ChromeLauncherAppMenuItemTab::Execute(int event_flags) {
   if (!web_contents())