mash: Cleanup ash shelf application menu code.

chrome/browser/ui/ash/launcher/chrome_launcher_app_menu_item_v2app.cc

 // Copyright (c) 2012 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/ash/launcher/chrome_launcher_app_menu_item_v2app.h"
 
 #include "chrome/browser/ui/ash/launcher/chrome_launcher_controller.h"
 
 ChromeLauncherAppMenuItemV2App::ChromeLauncherAppMenuItemV2App(
     const base::string16 title,
     const gfx::Image* icon,
     const std::string& app_id,
     ChromeLauncherController* launcher_controller,
-    int app_index,
-    bool has_leading_separator)
-    : ChromeLauncherAppMenuItem(title, icon, has_leading_separator),
+    int app_index)
+    : ash::ShelfApplicationMenuItem(title, icon),
       launcher_controller_(launcher_controller),
       app_id_(app_id),
-      app_index_(app_index) {
-}
+      app_index_(app_index) {}
 
-ChromeLauncherAppMenuItemV2App::~ChromeLauncherAppMenuItemV2App() {
-}
-
-bool ChromeLauncherAppMenuItemV2App::IsEnabled() const {
-  return true;
-}
+ChromeLauncherAppMenuItemV2App::~ChromeLauncherAppMenuItemV2App() {}
 
 void ChromeLauncherAppMenuItemV2App::Execute(int event_flags) {
   // Note: At this time there is only a single app running at any point. as
   // such we will never come here with usable |event_flags|. If that ever
   // changes we should add some special close code here.
   // Note: If the application item did go away since the menu was created,
   // The controller will take care of it.
   launcher_controller_->ActivateShellApp(app_id_, app_index_);
 }