Revert of [Sync] Refactor AttachmentStore classes. Introduce concept of referrer.

components/dom_distiller/core/dom_distiller_store.h

 // Copyright 2013 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 COMPONENTS_DOM_DISTILLER_CORE_DOM_DISTILLER_STORE_H_
 #define COMPONENTS_DOM_DISTILLER_CORE_DOM_DISTILLER_STORE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 181 matching lines @@
   void ApplyChangesToModel(const syncer::SyncChangeList& change_list,
                            syncer::SyncChangeList* changes_applied,
                            syncer::SyncChangeList* changes_missing);
 
   void NotifyObservers(const syncer::SyncChangeList& changes);
 
   scoped_ptr<syncer::SyncChangeProcessor> sync_processor_;
   scoped_ptr<syncer::SyncErrorFactory> error_factory_;
   scoped_ptr<leveldb_proto::ProtoDatabase<ArticleEntry> > database_;
   bool database_loaded_;
-  scoped_ptr<syncer::AttachmentStore> attachment_store_;
+  scoped_refptr<syncer::AttachmentStore> attachment_store_;
   ObserverList<DomDistillerObserver> observers_;
 
   DomDistillerModel model_;
 
   base::WeakPtrFactory<DomDistillerStore> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DomDistillerStore);
 };
 
 }  // namespace dom_distiller
 
 #endif  // COMPONENTS_DOM_DISTILLER_CORE_DOM_DISTILLER_STORE_H_