[ntp4] Bookmarks page implementation, first-pass.

chrome/browser/ui/webui/ntp/favicon_webui_handler.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_UI_WEBUI_NTP_FAVICON_WEBUI_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_NTP_FAVICON_WEBUI_HANDLER_H_
 #pragma once
 
 #include <string>
 
@@ skipping 23 matching lines @@
   // Called when favicon data is available from the history backend.
   void OnFaviconDataAvailable(FaviconService::Handle request_handle,
                               history::FaviconData favicon);
 
   CancelableRequestConsumerTSimple<int> consumer_;
 
   // Raw PNG representation of the favicon to show when the favicon
   // database doesn't have a favicon for a webpage.
   scoped_refptr<RefCountedMemory> default_favicon_;
 
+  // A mapping of favicon ID to callback names for requests that are
+  // in-progress.
+  std::map<int, std::string> callbacks_map_;
+
   DISALLOW_COPY_AND_ASSIGN(FaviconWebUIHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_NTP_FAVICON_WEBUI_HANDLER_H_