Move ReadingList model to components/reading_list/core

ios/chrome/browser/reading_list/reading_list_download_service.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 IOS_CHROME_BROWSER_READING_LIST_READING_LIST_DOWNLOAD_SERVICE_H_
 #define IOS_CHROME_BROWSER_READING_LIST_READING_LIST_DOWNLOAD_SERVICE_H_
 
 #include "base/macros.h"
 #include "components/keyed_service/core/keyed_service.h"
-#include "components/reading_list/ios/reading_list_model_observer.h"
+#include "components/reading_list/core/reading_list_model_observer.h"
 #include "ios/chrome/browser/reading_list/url_downloader.h"
 #include "net/base/network_change_notifier.h"
 
 class GURL;
 class PrefService;
 class ReadingListModel;
 namespace base {
 class FilePath;
 }
 
@@ skipping 91 matching lines @@
   std::unique_ptr<reading_list::ReadingListDistillerPageFactory>
       distiller_page_factory_;
   std::unique_ptr<dom_distiller::DistillerFactory> distiller_factory_;
 
   base::WeakPtrFactory<ReadingListDownloadService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ReadingListDownloadService);
 };
 
 #endif  // IOS_CHROME_BROWSER_READING_LIST_READING_LIST_DOWNLOAD_SERVICE_H_