Clean ReadingListModel.

components/reading_list/ios/reading_list_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_READING_LIST_IOS_READING_LIST_MODEL_IMPL_H_
 #define COMPONENTS_READING_LIST_IOS_READING_LIST_MODEL_IMPL_H_
 
 #include <map>
 #include <memory>
 
@@ skipping 28 matching lines @@
   void StoreLoaded(std::unique_ptr<ReadingListEntries> entries) override;
 
   // KeyedService implementation.
   void Shutdown() override;
 
   // ReadingListModel implementation.
   bool loaded() const override;
 
   size_t size() const override;
   size_t unread_size() const override;
-  size_t read_size() const override;
 
   bool HasUnseenEntries() const override;
   void ResetUnseenEntries() override;
 
   const std::vector<GURL> Keys() const override;
 
   const ReadingListEntry* GetEntryByURL(const GURL& gurl) const override;
-  const ReadingListEntry& GetUnreadEntryAtIndex(size_t index) const override;
-  const ReadingListEntry& GetReadEntryAtIndex(size_t index) const override;
-  void MarkReadByURL(const GURL& url) override;
-  void MarkUnreadByURL(const GURL& url) override;
 
   void RemoveEntryByURL(const GURL& url) override;
 
   const ReadingListEntry& AddEntry(const GURL& url,
                                    const std::string& title) override;
 
   void SetReadStatus(const GURL& url, bool read) override;
 
   void SetEntryTitle(const GURL& url, const std::string& title) override;
   void SetEntryDistilledPath(const GURL& url,
@@ skipping 43 matching lines @@
 
   // Remove entry |url| and propagate to store if |from_sync| is false.
   void RemoveEntryByURLImpl(const GURL& url, bool from_sync);
 
   void RebuildIndex() const;
 
   std::unique_ptr<ReadingListEntries> entries_;
   size_t unread_entry_count_;
   size_t read_entry_count_;
 
-  // TODO(crbug.com/664924): Remove temporary cache and move it to
-  // ReadingListViewController.
-  struct Cache {
-    Cache();
-    ~Cache();
-    std::vector<GURL> read_entries;
-    std::vector<GURL> unread_entries;
-    bool dirty;
-  };
-  std::unique_ptr<struct Cache> cache_;
-
   std::unique_ptr<ReadingListModelStorage> storage_layer_;
   PrefService* pref_service_;
   bool has_unseen_;
   bool loaded_;
   base::WeakPtrFactory<ReadingListModelImpl> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(ReadingListModelImpl);
 };
 
 #endif  // COMPONENTS_READING_LIST_IOS_READING_LIST_MODEL_IMPL_H_