AppCaches which belong to hosted apps are not protected from deletion

webkit/appcache/appcache_storage_impl.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 WEBKIT_APPCACHE_APPCACHE_STORAGE_IMPL_H_
 #define WEBKIT_APPCACHE_APPCACHE_STORAGE_IMPL_H_
 
 #include <deque>
 #include <map>
 #include <set>
@@ skipping 139 matching lines @@
   // disk cache and cannot continue.
   bool is_disabled_;
 
   // TODO(michaeln): use a disk_cache per group (manifest or group_id).
   scoped_ptr<AppCacheDiskCache> disk_cache_;
 
   // Used to short-circuit certain operations without having to schedule
   // any tasks on the background database thread.
   std::deque<Task*> pending_simple_tasks_;
   ScopedRunnableMethodFactory<AppCacheStorageImpl> method_factory_;
-
-  FRIEND_TEST_ALL_PREFIXES(ChromeAppCacheServiceTest, KeepOnDestruction);
-  FRIEND_TEST_ALL_PREFIXES(ChromeAppCacheServiceTest, RemoveOnDestruction);
 };
 
 }  // namespace appcache
 
 #endif  // WEBKIT_APPCACHE_APPCACHE_STORAGE_IMPL_H_