Mirror app list hierarchy data in profile prefs.

chrome/browser/ui/app_list/model_pref_updater.h

+// Copyright 2014 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_UI_APP_LIST_MODEL_PREF_UPDATER_H_
+#define CHROME_BROWSER_UI_APP_LIST_MODEL_PREF_UPDATER_H_
+
+#include "base/macros.h"
+#include "ui/app_list/app_list_model_observer.h"
+
+namespace app_list {
+
+class AppListModel;
+class AppListPrefs;
+
+// A class which listens to an AppListModel and updates the local pref model of
+// the app list accordingly.
+class ModelPrefUpdater : public AppListModelObserver {
+ public:
+  ModelPrefUpdater(AppListPrefs* app_list_prefs, AppListModel* model);
+  virtual ~ModelPrefUpdater();
+
+  // Overridden from AppListModelObserver:
+  virtual void OnAppListItemAdded(AppListItem* item) OVERRIDE;
+  virtual void OnAppListItemWillBeDeleted(AppListItem* item) OVERRIDE;
+  virtual void OnAppListItemUpdated(AppListItem* item) OVERRIDE;
+
+ private:
+  void UpdatePrefsFromAppListItem(AppListItem* item);
+
+  AppListPrefs* app_list_prefs_;
+  AppListModel* model_;
+
+  DISALLOW_COPY_AND_ASSIGN(ModelPrefUpdater);
+};
+
+}  // namespace app_list
+
+#endif  // CHROME_BROWSER_UI_APP_LIST_MODEL_PREF_UPDATER_H_