[NTP::SectionOrder] Replace CategoryFactory with a category ranker.

chrome/browser/ntp_snippets/download_suggestions_provider.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 CHROME_BROWSER_NTP_SNIPPETS_DOWNLOAD_SUGGESTIONS_PROVIDER_H_
 #define CHROME_BROWSER_NTP_SNIPPETS_DOWNLOAD_SUGGESTIONS_PROVIDER_H_
 
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/weak_ptr.h"
 #include "components/ntp_snippets/callbacks.h"
 #include "components/ntp_snippets/category.h"
-#include "components/ntp_snippets/category_factory.h"
 #include "components/ntp_snippets/category_status.h"
 #include "components/ntp_snippets/content_suggestion.h"
 #include "components/ntp_snippets/content_suggestions_provider.h"
 #include "components/offline_pages/core/offline_page_model.h"
 #include "content/public/browser/download_manager.h"
 
 class PrefRegistrySimple;
 class PrefService;
 
 namespace offline_pages {
 struct OfflinePageItem;
 }
 
 // Provides download content suggestions from the offline pages model and the
 // download manager (obtaining the data through DownloadManager and each
 // DownloadItem). Offline page related downloads are referred to as offline page
 // downloads, while the remaining downloads (e.g. images, music, books) are
 // called asset downloads. In case either of the data sources is |nullptr|, it
 // is ignored.
 class DownloadSuggestionsProvider
     : public ntp_snippets::ContentSuggestionsProvider,
       public offline_pages::OfflinePageModel::Observer,
       public content::DownloadManager::Observer,
       public content::DownloadItem::Observer {
  public:
   DownloadSuggestionsProvider(
       ContentSuggestionsProvider::Observer* observer,
-      ntp_snippets::CategoryFactory* category_factory,
       offline_pages::OfflinePageModel* offline_page_model,
       content::DownloadManager* download_manager,
       PrefService* pref_service,
       bool download_manager_ui_enabled);
   ~DownloadSuggestionsProvider() override;
 
   // ContentSuggestionsProvider implementation.
   ntp_snippets::CategoryStatus GetCategoryStatus(
       ntp_snippets::Category category) override;
   ntp_snippets::CategoryInfo GetCategoryInfo(
@@ skipping 165 matching lines @@
   // Whether the Download Manager UI is enabled, in which case the More button
   // for the Downloads section can redirect there.
   const bool download_manager_ui_enabled_;
 
   base::WeakPtrFactory<DownloadSuggestionsProvider> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadSuggestionsProvider);
 };
 
 #endif  // CHROME_BROWSER_NTP_SNIPPETS_DOWNLOAD_SUGGESTIONS_PROVIDER_H_