Add Store+Sync to reading list.

ios/chrome/browser/reading_list/reading_list_model_storage_defaults.h

Index: ios/chrome/browser/reading_list/reading_list_model_storage_defaults.h
diff --git a/ios/chrome/browser/reading_list/reading_list_model_storage_defaults.h b/ios/chrome/browser/reading_list/reading_list_model_storage_defaults.h
deleted file mode 100644
index e989bd1f68f899d51cbbd9a6b777f9e4b41fccba..0000000000000000000000000000000000000000
--- a/ios/chrome/browser/reading_list/reading_list_model_storage_defaults.h
+++ /dev/null
@@ -1,38 +0,0 @@
-// 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 IOS_CHROME_BROWSER_READING_LIST_READING_LIST_MODEL_STORAGE_DEFAULTS_H_
-#define IOS_CHROME_BROWSER_READING_LIST_READING_LIST_MODEL_STORAGE_DEFAULTS_H_
-
-#include "ios/chrome/browser/reading_list/reading_list_entry.h"
-#include "ios/chrome/browser/reading_list/reading_list_model_storage.h"
-
-class ReadingListModel;
-#ifdef __OBJC__
-@class NSUserDefaults;
-#else
-typedef struct objc_object NSUserDefaults;
-#endif
-
-// Implementation of ReadingListModelStorage that stores reading list items in
-// the system user defaults.
-class ReadingListModelStorageDefaults : public ReadingListModelStorage {
- public:
-  ReadingListModelStorageDefaults();
-  ReadingListModelStorageDefaults(NSUserDefaults* backend);
-  ~ReadingListModelStorageDefaults();
-
-  std::vector<ReadingListEntry> LoadPersistentReadList() override;
-  std::vector<ReadingListEntry> LoadPersistentUnreadList() override;
-
-  void SavePersistentReadList(
-      const std::vector<ReadingListEntry>& read) override;
-  void SavePersistentUnreadList(
-      const std::vector<ReadingListEntry>& unread) override;
-
- private:
-  NSUserDefaults* backend_;
-};
-
-#endif  // IOS_CHROME_BROWSER_READING_LIST_READING_LIST_MODEL_STORAGE_DEFAULTS_H_