Remove usage of DomDistillerService in ReadingListDownloadService.

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 "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;
 }
 
-namespace dom_distiller {
-class DomDistillerService;
-}
-
 namespace reading_list {
 class ReadingListDistillerPageFactory;
 }
 
 // Observes the reading list and downloads offline versions of its articles.
 // Any calls made to DownloadEntry before the model is loaded will be ignored.
 // When the model is loaded, offline directory is automatically synced with the
 // entries in the model.
 class ReadingListDownloadService
     : public KeyedService,
       public ReadingListModelObserver,
       public net::NetworkChangeNotifier::ConnectionTypeObserver {
  public:
   ReadingListDownloadService(
       ReadingListModel* reading_list_model,
-      dom_distiller::DomDistillerService* distiller_service,
       PrefService* prefs,
       base::FilePath chrome_profile_path,
       net::URLRequestContextGetter* url_request_context_getter,
+      std::unique_ptr<dom_distiller::DistillerFactory> distiller_factory,
       std::unique_ptr<reading_list::ReadingListDistillerPageFactory>
           distiller_page_factory);
   ~ReadingListDownloadService() override;
 
   // Initializes the reading list download service.
   void Initialize();
 
   // The root folder containing all the offline files.
   virtual base::FilePath OfflineRoot() const;
 
@@ skipping 50 matching lines @@
       net::NetworkChangeNotifier::ConnectionType type) override;
 
   ReadingListModel* reading_list_model_;
   base::FilePath chrome_profile_path_;
   std::unique_ptr<URLDownloader> url_downloader_;
   std::vector<GURL> url_to_download_cellular_;
   std::vector<GURL> url_to_download_wifi_;
   bool had_connection_;
   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_