aura: Implement app list M19 mock.

ash/app_list/app_list_item_view_listener.h

Index: ash/app_list/app_list_item_view_listener.h
diff --git a/ash/app_list/app_list_item_view_listener.h b/ash/app_list/app_list_item_view_listener.h
deleted file mode 100644
index a008f7279117dda858856c5ce1cb6b9fd7b6885a..0000000000000000000000000000000000000000
--- a/ash/app_list/app_list_item_view_listener.h
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright (c) 2011 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.
-
-#ifndef ASH_APP_LIST_APP_LIST_ITEM_VIEW_LISTENER_H_
-#define ASH_APP_LIST_APP_LIST_ITEM_VIEW_LISTENER_H_
-#pragma once
-
-#include "ash/ash_export.h"
-
-namespace ash {
-
-class AppListItemView;
-
-class ASH_EXPORT AppListItemViewListener {
- public:
-  // Invoked when an AppListeItemModelView is activated by click or enter key.
-  virtual void AppListItemActivated(AppListItemView* sender,
-                                    int event_flags) = 0;
-
- protected:
-  virtual ~AppListItemViewListener() {}
-};
-
-}  // namespace ash
-
-#endif  // ASH_APP_LIST_APP_LIST_ITEM_VIEW_LISTENER_H_