Combine all suggestions factories into ContentSuggestionsServiceFactory

components/ntp_snippets/offline_pages/offline_page_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 COMPONENTS_NTP_SNIPPETS_OFFLINE_PAGES_OFFLINE_PAGE_SUGGESTIONS_PROVIDER_H_
 #define COMPONENTS_NTP_SNIPPETS_OFFLINE_PAGES_OFFLINE_PAGE_SUGGESTIONS_PROVIDER_H_
 
 #include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
-#include "components/keyed_service/core/keyed_service.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/offline_page_model.h"
 #include "components/offline_pages/offline_page_types.h"
 
 namespace gfx {
 class Image;
 }
 
 namespace ntp_snippets {
 
 // Provides content suggestions from the offline pages model.
 // Currently, those are only the pages that the user last navigated to in an
 // open tab and offlined bookmarks.
 class OfflinePageSuggestionsProvider
-    : public KeyedService,
-      public ContentSuggestionsProvider,
+    : public ContentSuggestionsProvider,
       public offline_pages::OfflinePageModel::Observer {
  public:
   OfflinePageSuggestionsProvider(
+      ContentSuggestionsProvider::Observer* observer,
       CategoryFactory* category_factory,
       offline_pages::OfflinePageModel* offline_page_model);
   ~OfflinePageSuggestionsProvider() override;
 
-  // Inherited from KeyedService.
-  void Shutdown() override;
-
  private:
   // ContentSuggestionsProvider implementation.
   std::vector<Category> GetProvidedCategories() override;
-  void SetObserver(ContentSuggestionsProvider::Observer* observer) override;
   CategoryStatus GetCategoryStatus(Category category) override;
   void DismissSuggestion(const std::string& suggestion_id) override;
   void FetchSuggestionImage(const std::string& suggestion_id,
                             const ImageFetchedCallback& callback) override;
   void ClearCachedSuggestionsForDebugging() override;
   void ClearDismissedSuggestionsForDebugging() override;
 
   // OfflinePageModel::Observer implementation.
   void OfflinePageModelLoaded(offline_pages::OfflinePageModel* model) override;
   void OfflinePageModelChanged(offline_pages::OfflinePageModel* model) override;
   void OfflinePageDeleted(int64_t offline_id,
                           const offline_pages::ClientId& client_id) override;
 
   // Queries the OfflinePageModel for offline pages.
   void FetchOfflinePages();
 
   // Callback from the OfflinePageModel.
   void OnOfflinePagesLoaded(
       const offline_pages::MultipleOfflinePageItemResult& result);
 
   // Updates the |category_status_| and notifies the |observer_|, if necessary.
   void NotifyStatusChanged(CategoryStatus new_status);
 
   CategoryStatus category_status_;
 
-  ContentSuggestionsProvider::Observer* observer_;
-
   offline_pages::OfflinePageModel* offline_page_model_;
 
   const Category provided_category_;
 
   DISALLOW_COPY_AND_ASSIGN(OfflinePageSuggestionsProvider);
 };
 
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_OFFLINE_PAGES_OFFLINE_PAGE_SUGGESTIONS_PROVIDER_H_