[Refactor] Simplify HistoryBackend::UpdateFaviconMappingsAndFetchImpl() signature

components/favicon/core/favicon_service_impl.h

 // Copyright (c) 2012 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_FAVICON_CORE_FAVICON_SERVICE_IMPL_H_
 #define COMPONENTS_FAVICON_CORE_FAVICON_SERVICE_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 63 matching lines @@
       const favicon_base::FaviconRawBitmapCallback& callback,
       base::CancelableTaskTracker* tracker) override;
   base::CancelableTaskTracker::TaskId GetFaviconForPageURL(
       const GURL& page_url,
       int icon_types,
       int desired_size_in_dip,
       const favicon_base::FaviconResultsCallback& callback,
       base::CancelableTaskTracker* tracker) override;
   base::CancelableTaskTracker::TaskId UpdateFaviconMappingsAndFetch(
       const GURL& page_url,
-      const std::vector<GURL>& icon_urls,
-      int icon_types,
+      const GURL& icon_url,
+      favicon_base::IconType icon_type,
       int desired_size_in_dip,
       const favicon_base::FaviconResultsCallback& callback,
       base::CancelableTaskTracker* tracker) override;
   base::CancelableTaskTracker::TaskId GetLargestRawFaviconForID(
       favicon_base::FaviconID favicon_id,
       const favicon_base::FaviconRawBitmapCallback& callback,
       base::CancelableTaskTracker* tracker) override;
   void SetFaviconOutOfDateForPage(const GURL& page_url) override;
   void SetImportedFavicons(
       const favicon_base::FaviconUsageDataList& favicon_usage) override;
@@ skipping 50 matching lines @@
   base::hash_set<MissingFaviconURLHash> missing_favicon_urls_;
   std::unique_ptr<FaviconClient> favicon_client_;
   history::HistoryService* history_service_;
 
   DISALLOW_COPY_AND_ASSIGN(FaviconServiceImpl);
 };
 
 }  // namespace favicon
 
 #endif  // COMPONENTS_FAVICON_CORE_FAVICON_SERVICE_IMPL_H_