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

components/ntp_snippets/offline_pages/recent_tab_suggestions_provider.cc

 // 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.
 
 #include "components/ntp_snippets/offline_pages/recent_tab_suggestions_provider.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 55 matching lines @@
   OfflinePageModelQueryBuilder builder;
   builder.RequireShownAsRecentlyVisitedSite(
       OfflinePageModelQuery::Requirement::INCLUDE_MATCHING);
   return builder.Build(model->GetPolicyController());
 }
 
 }  // namespace
 
 RecentTabSuggestionsProvider::RecentTabSuggestionsProvider(
     ContentSuggestionsProvider::Observer* observer,
-    CategoryFactory* category_factory,
     offline_pages::OfflinePageModel* offline_page_model,
     PrefService* pref_service)
-    : ContentSuggestionsProvider(observer, category_factory),
+    : ContentSuggestionsProvider(observer),
       category_status_(CategoryStatus::AVAILABLE_LOADING),
       provided_category_(
-          category_factory->FromKnownCategory(KnownCategories::RECENT_TABS)),
+          Category::FromKnownCategory(KnownCategories::RECENT_TABS)),
       offline_page_model_(offline_page_model),
       pref_service_(pref_service),
       weak_ptr_factory_(this) {
   observer->OnCategoryStatusChanged(this, provided_category_, category_status_);
   offline_page_model_->AddObserver(this);
   FetchRecentTabs();
 }
 
 RecentTabSuggestionsProvider::~RecentTabSuggestionsProvider() {
   offline_page_model_->RemoveObserver(this);
@@ skipping 245 matching lines @@
 }
 
 void RecentTabSuggestionsProvider::StoreDismissedIDsToPrefs(
     const std::set<std::string>& dismissed_ids) {
   prefs::StoreDismissedIDsToPrefs(pref_service_,
                                   prefs::kDismissedRecentOfflineTabSuggestions,
                                   dismissed_ids);
 }
 
 }  // namespace ntp_snippets