[Remote suggestions] Get favicon URLs from archive

components/ntp_snippets/content_suggestions_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 COMPONENTS_NTP_SNIPPETS_CONTENT_SUGGESTIONS_SERVICE_H_
 #define COMPONENTS_NTP_SNIPPETS_CONTENT_SUGGESTIONS_SERVICE_H_
 
 #include <map>
 #include <memory>
 #include <set>
@@ skipping 310 matching lines @@
   void NotifyCategoryStatusChanged(Category category);
 
   void OnSignInStateChanged();
 
   // Re-enables a dismissed category, making querying its provider possible.
   void RestoreDismissedCategory(Category category);
 
   void RestoreDismissedCategoriesFromPrefs();
   void StoreDismissedCategoriesToPrefs();
 
+  // Get the domain of the suggestion suitable for fetching the favicon.
+  GURL GetFaviconDomain(const ContentSuggestion::ID& suggestion_id);
   // Callbacks for fetching favicons.
   void OnGetFaviconFromCacheFinished(
       const GURL& publisher_url,
       int minimum_size_in_pixel,
       int desired_size_in_pixel,
       const ImageFetchedCallback& callback,
       bool continue_to_google_server,
       const favicon_base::LargeIconImageResult& result);
   void OnGetFaviconFromGoogleServerFinished(
       const GURL& publisher_url,
@@ skipping 67 matching lines @@
 
   // Provides order for categories.
   std::unique_ptr<CategoryRanker> category_ranker_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentSuggestionsService);
 };
 
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_CONTENT_SUGGESTIONS_SERVICE_H_