mash: Use mojo for ShelfItemDelegate and [app] MenuItem.

ash/public/cpp/shelf_application_menu_item.cc

Index: ash/public/cpp/shelf_application_menu_item.cc
diff --git a/ash/public/cpp/shelf_application_menu_item.cc b/ash/public/cpp/shelf_application_menu_item.cc
deleted file mode 100644
index 76191eb946c9b7ccb38d825d94625291ea2b9636..0000000000000000000000000000000000000000
--- a/ash/public/cpp/shelf_application_menu_item.cc
+++ /dev/null
@@ -1,18 +0,0 @@
-// Copyright 2017 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 "ash/public/cpp/shelf_application_menu_item.h"
-
-namespace ash {
-
-ShelfApplicationMenuItem::ShelfApplicationMenuItem(uint32_t command_id,
-                                                   const base::string16& title,
-                                                   const gfx::Image* icon)
-    : command_id_(command_id),
-      title_(title),
-      icon_(icon ? gfx::Image(*icon) : gfx::Image()) {}
-
-ShelfApplicationMenuItem::~ShelfApplicationMenuItem() {}
-
-}  // namespace ash