Remove chrome/ code to handle App Notifications

chrome/browser/extensions/app_notification_storage.h

-// Copyright (c) 2012 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_EXTENSIONS_APP_NOTIFICATION_STORAGE_H__
-#define CHROME_BROWSER_EXTENSIONS_APP_NOTIFICATION_STORAGE_H__
-
-#include <set>
-
-#include "chrome/browser/extensions/app_notification.h"
-
-namespace base {
-class FilePath;
-}
-
-namespace extensions {
-
-// Represents storage for app notifications for a particular extension id.
-//
-// IMPORTANT NOTE: Instances of this class should only be used on the FILE
-// thread.
-class AppNotificationStorage {
- public:
-  // Must be called on the FILE thread. The storage will be created at |path|.
-  static AppNotificationStorage* Create(const base::FilePath& path);
-
-  virtual ~AppNotificationStorage();
-
-  // Get the set of extension id's that have entries, putting them into
-  // |result|.
-  virtual bool GetExtensionIds(std::set<std::string>* result) = 0;
-
-  // Gets the list of stored notifications for extension_id. On success, writes
-  // results into |result|. On error, returns false.
-  virtual bool Get(const std::string& extension_id,
-                   AppNotificationList* result) = 0;
-
-  // Writes the |list| for |extension_id| into storage.
-  virtual bool Set(const std::string& extension_id,
-                   const AppNotificationList& list) = 0;
-
-  // Deletes all data for |extension_id|.
-  virtual bool Delete(const std::string& extension_id) = 0;
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_APP_NOTIFICATION_STORAGE_H__