[Icons NTP] FaviconService: Add method to retrieve large icon.

components/favicon/core/browser/favicon_service.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_BROWSER_FAVICON_SERVICE_H_
 #define COMPONENTS_FAVICON_CORE_BROWSER_FAVICON_SERVICE_H_
 
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 110 matching lines @@
       const favicon_base::FaviconRawBitmapCallback& callback,
       base::CancelableTaskTracker* tracker);
 
   base::CancelableTaskTracker::TaskId GetFaviconForPageURL(
       const GURL& page_url,
       int icon_types,
       int desired_size_in_dip,
       const favicon_base::FaviconResultsCallback& callback,
       base::CancelableTaskTracker* tracker);
 
+  // Requests a generic large icon, not caring about which type.
+  base::CancelableTaskTracker::TaskId GetGenericLargeIconForPageURL(
+      const GURL& page_url,
+      int desired_size_in_pixel,
+      const favicon_base::FaviconRawBitmapCallback& callback,
+      base::CancelableTaskTracker* tracker);
+
   // Set the favicon mappings to |page_url| for |icon_types| in the history
   // database.
   // Sample |icon_urls|:
   //  { ICON_URL1 -> TOUCH_ICON, known to the database,
   //    ICON_URL2 -> TOUCH_ICON, not known to the database,
   //    ICON_URL3 -> TOUCH_PRECOMPOSED_ICON, known to the database }
   // The new mappings are computed from |icon_urls| with these rules:
   // 1) Any urls in |icon_urls| which are not already known to the database are
   //    rejected.
   //    Sample new mappings to |page_url|: { ICON_URL1, ICON_URL3 }
@@ skipping 104 matching lines @@
           favicon_bitmap_results);
 
   base::hash_set<MissingFaviconURLHash> missing_favicon_urls_;
   history::HistoryService* history_service_;
   FaviconClient* favicon_client_;
 
   DISALLOW_COPY_AND_ASSIGN(FaviconService);
 };
 
 #endif  // COMPONENTS_FAVICON_CORE_BROWSER_FAVICON_SERVICE_H_