Bookmark Undo service for multiple level undo/redo of bookmarks.

chrome/browser/undo/bookmark_undo_service_factory.h

+// 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 CHROME_BROWSER_UNDO_BOOKMARK_UNDO_SERVICE_FACTORY_H_
+#define CHROME_BROWSER_UNDO_BOOKMARK_UNDO_SERVICE_FACTORY_H_
+
+#include "base/memory/singleton.h"
+#include "components/browser_context_keyed_service/browser_context_keyed_service_factory.h"
+
+class BookmarkUndoService;
+class Profile;
+
+class BookmarkUndoServiceFactory : public BrowserContextKeyedServiceFactory {
+ public:
+  static BookmarkUndoService* GetForProfile(Profile* profile);
+
+  static BookmarkUndoServiceFactory* GetInstance();
+
+ private:
+  friend struct DefaultSingletonTraits<BookmarkUndoServiceFactory>;
+
+  BookmarkUndoServiceFactory();
+  virtual ~BookmarkUndoServiceFactory();
+
+  // BrowserContextKeyedServiceFactory:
+  virtual BrowserContextKeyedService* BuildServiceInstanceFor(
+      content::BrowserContext* context) const OVERRIDE;
+
+  DISALLOW_COPY_AND_ASSIGN(BookmarkUndoServiceFactory);
+};
+
+#endif  // CHROME_BROWSER_UNDO_BOOKMARK_UNDO_SERVICE_FACTORY_H_