Add storage code to appcache update process.

webkit/appcache/appcache_group.h

 // Copyright (c) 2009 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_GROUP_H_
 #define WEBKIT_APPCACHE_APPCACHE_GROUP_H_
 
 #include <vector>
 
 #include "base/observer_list.h"
@@ skipping 68 matching lines @@
   friend class AppCacheUpdateJobTest;
   friend class MockAppCacheStorage;  // for old_caches()
 
   typedef std::vector<AppCache*> Caches;
 
   AppCacheUpdateJob* update_job() { return update_job_; }
   void SetUpdateStatus(UpdateStatus status);
 
   const Caches& old_caches() const { return old_caches_; }
 
+  // Used by update process to restore the group's newest cache if storage
+  // fails to store the newly created cache.
+  void RestoreCacheAsNewest(AppCache* cache);
+
   GURL manifest_url_;
   UpdateStatus update_status_;
   bool is_obsolete_;
 
   // Old complete app caches.
   Caches old_caches_;
 
   // Newest cache in this group to be complete, aka relevant cache.
   AppCache* newest_complete_cache_;
 
   // Current update job for this group, if any.
   AppCacheUpdateJob* update_job_;
 
   // Central service object.
   AppCacheService* service_;
 
   // List of objects observing this group.
   ObserverList<UpdateObserver> observers_;
 
   FRIEND_TEST(AppCacheGroupTest, StartUpdate);
   FRIEND_TEST(AppCacheGroupTest, CancelUpdate);
   FRIEND_TEST(AppCacheUpdateJobTest, AlreadyChecking);
   FRIEND_TEST(AppCacheUpdateJobTest, AlreadyDownloading);
   DISALLOW_COPY_AND_ASSIGN(AppCacheGroup);
 };
 
 }  // namespace appcache
 
 #endif  // WEBKIT_APPCACHE_APPCACHE_GROUP_H_