Remove unused ThumbnailDatabase::UpdateIconMapping() and ThumbnailDatabase::CloneIconMappings()

components/favicon/core/favicon_service.cc

 // 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.
 
 #include "components/favicon/core/favicon_service.h"
 
 #include <cmath>
 
 #include "base/hash.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 213 matching lines @@
         favicon_id, desired_size, callback_runner, tracker);
   }
   return RunWithEmptyResultAsync(callback_runner, tracker);
 }
 
 void FaviconService::SetFaviconOutOfDateForPage(const GURL& page_url) {
   if (history_service_)
     history_service_->SetFaviconsOutOfDateForPage(page_url);
 }
 
-void FaviconService::CloneFavicon(const GURL& old_page_url,
-                                  const GURL& new_page_url) {
-  if (history_service_)
-    history_service_->CloneFavicons(old_page_url, new_page_url);
-}
-
 void FaviconService::SetImportedFavicons(
     const favicon_base::FaviconUsageDataList& favicon_usage) {
   if (history_service_)
     history_service_->SetImportedFavicons(favicon_usage);
 }
 
 void FaviconService::MergeFavicon(
     const GURL& page_url,
     const GURL& icon_url,
     favicon_base::IconType icon_type,
@@ skipping 121 matching lines @@
     callback.Run(favicon_base::FaviconRawBitmapResult());
     return;
   }
 
   bitmap_result.bitmap_data = base::RefCountedBytes::TakeVector(
       &resized_bitmap_data);
   callback.Run(bitmap_result);
 }
 
 }  // namespace favicon