Provide assumed favicon for intents if service provider page was never visited.

chrome/browser/history/history.h

 // Copyright (c) 2011 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 CHROME_BROWSER_HISTORY_HISTORY_H_
 #define CHROME_BROWSER_HISTORY_HISTORY_H_
 #pragma once
 
 #include <set>
 #include <vector>
@@ skipping 648 matching lines @@
 
   // Used by the FaviconService to get a favicon from the history backend.
   void GetFaviconForURL(FaviconService::GetFaviconRequest* request,
                         const GURL& page_url,
                         int icon_types);
 
   // Used by the FaviconService to mark the favicon for the page as being out
   // of date.
   void SetFaviconOutOfDateForPage(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 CloneFavicon(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 std::vector<history::ImportedFaviconUsage>& favicon_usage);
 
   // Used by the FaviconService to set the favicon for a page on the history
   // backend.
   void SetFavicon(const GURL& page_url,
                   const GURL& icon_url,
@@ skipping 191 matching lines @@
   BookmarkService* bookmark_service_;
   bool no_db_;
 
   // True if needs top site migration.
   bool needs_top_sites_migration_;
 
   DISALLOW_COPY_AND_ASSIGN(HistoryService);
 };
 
 #endif  // CHROME_BROWSER_HISTORY_HISTORY_H_