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

components/history/core/browser/history_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_HISTORY_CORE_BROWSER_HISTORY_SERVICE_H_
 #define COMPONENTS_HISTORY_CORE_BROWSER_HISTORY_SERVICE_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 730 matching lines @@
   // favicon bitmap if it is present in the history backend.
   void SetFavicons(const GURL& page_url,
                    favicon_base::IconType icon_type,
                    const GURL& icon_url,
                    const std::vector<SkBitmap>& bitmaps);
 
   // Used by the FaviconService to mark the favicon for the page as being out
   // of date.
   void SetFaviconsOutOfDateForPage(const GURL& page_url);
 
-  // Used by the FaviconService to clone favicons from one page to another,
-  // provided that other page does not already have favicons.
-  void CloneFavicons(const GURL& old_page_url, const GURL& new_page_url);
-
   // Used by the FaviconService for importing many favicons for many pages at
   // once. The pages must exist, any favicon sets for unknown pages will be
   // discarded. Existing favicons will not be overwritten.
   void SetImportedFavicons(
       const favicon_base::FaviconUsageDataList& favicon_usage);
 
   // Sets the in-memory URL database. This is called by the backend once the
   // database is loaded to make it available.
   void SetInMemoryBackend(scoped_ptr<InMemoryHistoryBackend> mem_backend);
 
@@ skipping 47 matching lines @@
 
   // All vended weak pointers are invalidated in Cleanup().
   base::WeakPtrFactory<HistoryService> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(HistoryService);
 };
 
 }  // namespace history
 
 #endif  // COMPONENTS_HISTORY_CORE_BROWSER_HISTORY_SERVICE_H_