AppCaches which belong to hosted apps are not protected from deletion

chrome/browser/browsing_data_remover.h

 // 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 CHROME_BROWSER_BROWSING_DATA_REMOVER_H_
 #define CHROME_BROWSER_BROWSING_DATA_REMOVER_H_
 #pragma once
 
 #include <vector>
 
@@ skipping 141 matching lines @@
 
   // Callback when HTML5 file systems have been cleared.  Invokes
   // NotifyAndDeleteIfDone.
   void OnClearedFileSystems();
 
   // Invoked on the FILE thread to delete HTML5 file systems.
   void ClearFileSystemsOnFILEThread();
 
   // Callback when the appcache has been cleared. Invokes
   // NotifyAndDeleteIfDone.
-  void OnClearedAppCache();
+  void OnClearedAppCache(int rv);
 
   // Invoked on the IO thread to delete from the AppCache.
   void ClearAppCacheOnIOThread();
 
   // Lower level helpers.
   void OnGotAppCacheInfo(int rv);
   void OnAppCacheDeleted(int rv);
 
   // Callback when Gears data has been deleted. Invokes NotifyAndDeleteIfDone.
   void OnClearedGearsData();
@@ skipping 32 matching lines @@
   static bool removing_;
 
   // Reference to database tracker held while deleting databases.
   scoped_refptr<webkit_database::DatabaseTracker> database_tracker_;
 
   net::CompletionCallbackImpl<BrowsingDataRemover> database_cleared_callback_;
   net::CompletionCallbackImpl<BrowsingDataRemover> cache_callback_;
 
   // Used to clear the appcache.
   scoped_refptr<ChromeAppCacheService> appcache_service_;
-  net::CompletionCallbackImpl<BrowsingDataRemover> appcache_got_info_callback_;
-  net::CompletionCallbackImpl<BrowsingDataRemover> appcache_deleted_callback_;
-  scoped_refptr<appcache::AppCacheInfoCollection> appcache_info_;
-  int appcaches_to_be_deleted_count_;
+  net::CompletionCallbackImpl<BrowsingDataRemover> appcache_cleared_callback_;
 
   // Used to delete data from the HTTP caches.
   CacheState next_cache_state_;
   disk_cache::Backend* cache_;
 
   // Used to delete data from HTTP cache and appcache.
   scoped_refptr<net::URLRequestContextGetter> main_context_getter_;
   scoped_refptr<net::URLRequestContextGetter> media_context_getter_;
 
   // Used to delete plugin data.
@@ skipping 12 matching lines @@
 
   ObserverList<Observer> observer_list_;
 
   // Used if we need to clear history.
   CancelableRequestConsumer request_consumer_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowsingDataRemover);
 };
 
 #endif  // CHROME_BROWSER_BROWSING_DATA_REMOVER_H_