Revert 230227 "Implement app list folder management page UI, inc..."

trunk/src/ui/app_list/views/folder_header_view_delegate.h

Index: trunk/src/ui/app_list/views/folder_header_view_delegate.h
===================================================================
--- trunk/src/ui/app_list/views/folder_header_view_delegate.h	(revision 230254)
+++ trunk/src/ui/app_list/views/folder_header_view_delegate.h	(working copy)
@@ -1,27 +0,0 @@
-// 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.
-
-#ifndef UI_APP_LIST_VIEWS_FOLDER_HEADER_VIEW_DELEGATE_H_
-#define UI_APP_LIST_VIEWS_FOLDER_HEADER_VIEW_DELEGATE_H_
-
-namespace app_list {
-
-class AppListFolderItem;
-
-class FolderHeaderViewDelegate {
- public:
-  // Invoked when the back button on the folder header view is clicked.
-  // |item| is the folder item which FolderHeaderview represents.
-  // |event_flags| contains the flags of the keyboard/mouse event that triggers
-  // the request.
-  virtual void NavigateBack(AppListFolderItem* item,
-                            const ui::Event& event_flags) = 0;
-
- protected:
-  virtual ~FolderHeaderViewDelegate() {}
-};
-
-}  // namespace app_list
-
-#endif  // UI_APP_LIST_VIEWS_FOLDER_HEADER_VIEW_DELEGATE_H_