[Offline Pages] Duplicate pages when save/delete bookmarks.

components/offline_pages/offline_page_model_impl.h

 // Copyright 2016 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_OFFLINE_PAGES_OFFLINE_PAGE_MODEL_IMPL_H_
 #define COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_MODEL_IMPL_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 190 matching lines @@
   // in metadata store.
   void ExpirePagesMissingArchiveFile(
       const std::set<base::FilePath>& archive_paths);
   void OnExpirePagesMissingArchiveFileDone(
       const std::vector<int64_t>& offline_ids,
       bool success);
   void DeleteOrphanedArchives(const std::set<base::FilePath>& archive_paths);
   void OnDeleteOrphanedArchivesDone(const std::vector<base::FilePath>& archives,
                                     bool success);
 
+  // Callbacks for deleting pages with same URL when saving pages.
+  void OnPagesFoundWithSameURL(const ClientId& client_id,
+                               int64_t offline_id,
+                               const MultipleOfflinePageItemResult& items);
+  void OnDeleteOldPagesWithSameURL(DeletePageResult result);
+
   // Steps for clearing all.
   void OnRemoveAllFilesDoneForClearAll(const base::Closure& callback,
                                        DeletePageResult result);
   void OnResetStoreDoneForClearAll(const base::Closure& callback, bool success);
   void OnReloadStoreDoneForClearAll(
       const base::Closure& callback,
       OfflinePageMetadataStore::LoadStatus load_status,
       const std::vector<OfflinePageItem>& offline_pages);
 
   void CacheLoadedData(const std::vector<OfflinePageItem>& offline_pages);
@@ skipping 53 matching lines @@
   std::unique_ptr<ArchiveManager> archive_manager_;
 
   base::WeakPtrFactory<OfflinePageModelImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(OfflinePageModelImpl);
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_OFFLINE_PAGE_MODEL_IMPL_H_