Revert of Add Store+Sync to reading list.

ios/chrome/browser/reading_list/reading_list_model_storage.h

Index: ios/chrome/browser/reading_list/reading_list_model_storage.h
diff --git a/ios/chrome/browser/reading_list/reading_list_model_storage.h b/ios/chrome/browser/reading_list/reading_list_model_storage.h
index 9fe680d84fd2324671129501501dc35a8a4945ec..e55b1d5cba13798e76c92619590b5b8bfe073f1b 100644
--- a/ios/chrome/browser/reading_list/reading_list_model_storage.h
+++ b/ios/chrome/browser/reading_list/reading_list_model_storage.h
@@ -10,46 +10,18 @@
 #include "ios/chrome/browser/reading_list/reading_list_entry.h"
 
 class ReadingListModel;
-class ReadingListStoreDelegate;
-
-namespace syncer {
-class ModelTypeSyncBridge;
-}
 
 // Interface for a persistence layer for reading list.
 // All interface methods have to be called on main thread.
 class ReadingListModelStorage {
  public:
-  class ScopedBatchUpdate;
+  virtual std::vector<ReadingListEntry> LoadPersistentReadList() = 0;
+  virtual std::vector<ReadingListEntry> LoadPersistentUnreadList() = 0;
 
-  // Sets the model the Storage is backing.
-  // This will trigger store initalization and load persistent entries.
-  virtual void SetReadingListModel(ReadingListModel* model,
-                                   ReadingListStoreDelegate* delegate) = 0;
-
-  // Returns the class responsible for handling sync messages.
-  virtual syncer::ModelTypeSyncBridge* GetModelTypeSyncBridge() = 0;
-
-  // Starts a transaction. All Save/Remove entry will be delayed until the
-  // transaction is commited.
-  // Multiple transaction can be started at the same time. Commit will happen
-  // when the last transaction is commited.
-  // Returns a scoped batch update object that should be retained while the
-  // batch update is performed. Deallocating this object will inform model that
-  // the batch update has completed.
-  virtual std::unique_ptr<ScopedBatchUpdate> EnsureBatchCreated() = 0;
-
-  // Saves or updates an entry. If the entry is not yet in the database, it is
-  // created.
-  virtual void SaveEntry(const ReadingListEntry& entry, bool read) = 0;
-
-  // Removed an entry from the storage.
-  virtual void RemoveEntry(const ReadingListEntry& entry) = 0;
-
-  class ScopedBatchUpdate {
-   public:
-    virtual ~ScopedBatchUpdate() {}
-  };
+  virtual void SavePersistentReadList(
+      const std::vector<ReadingListEntry>& read) = 0;
+  virtual void SavePersistentUnreadList(
+      const std::vector<ReadingListEntry>& unread) = 0;
 };
 
 #endif  // IOS_CHROME_BROWSER_READING_LIST_READING_LIST_MODEL_STORAGE_H_