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

ash/common/shelf/app_list_shelf_item_delegate.cc

 // Copyright 2013 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/common/shelf/app_list_shelf_item_delegate.h"
 
 #include "ash/common/shelf/shelf_model.h"
 #include "ash/common/wm_shell.h"
 #include "ash/strings/grit/ash_strings.h"
 #include "base/memory/ptr_util.h"
@@ skipping 14 matching lines @@
   // Create an AppListShelfItemDelegate for that item.
   ShelfID id = model->items()[index].id;
   DCHECK_GE(id, 0);
   model->SetShelfItemDelegate(id, base::MakeUnique<AppListShelfItemDelegate>());
 }
 
 AppListShelfItemDelegate::AppListShelfItemDelegate() {}
 
 AppListShelfItemDelegate::~AppListShelfItemDelegate() {}
 
-ShelfAction AppListShelfItemDelegate::ItemSelected(ui::EventType event_type,
-                                                   int event_flags,
-                                                   int64_t display_id,
-                                                   ShelfLaunchSource source) {
+void AppListShelfItemDelegate::ItemSelected(
+    std::unique_ptr<ui::Event> event,
+    int64_t display_id,
+    ShelfLaunchSource source,
+    const ItemSelectedCallback& callback) {
   WmShell::Get()->ToggleAppList();
-  return SHELF_ACTION_APP_LIST_SHOWN;
-}
-
-ShelfAppMenuItemList AppListShelfItemDelegate::GetAppMenuItems(
-    int event_flags) {
-  // Return an empty item list to avoid showing an application menu.
-  return ShelfAppMenuItemList();
+  callback.Run(SHELF_ACTION_APP_LIST_SHOWN, MenuItemList());
 }
 
 void AppListShelfItemDelegate::ExecuteCommand(uint32_t command_id,
-                                              int event_flags) {
+                                              int32_t event_flags) {
   // This delegate does not support showing an application menu.
   NOTIMPLEMENTED();
 }
 
 void AppListShelfItemDelegate::Close() {}
 
 }  // namespace ash