Simplify WebUI data sources. Currently WebUI data sources implement a URLDataSourceDelegate interfa…

chrome/browser/ui/webui/session_favicon_source.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 "chrome/browser/ui/webui/session_favicon_source.h"
 
 #include "chrome/browser/sync/glue/session_model_associator.h"
 #include "chrome/browser/sync/profile_sync_service_factory.h"
 #include "chrome/browser/sync/profile_sync_service.h"
 #include "chrome/browser/ui/webui/chrome_url_data_manager.h"
@@ skipping 34 matching lines @@
   SessionModelAssociator* associator = sync_service ?
       sync_service->GetSessionModelAssociator() : NULL;
 
   std::string favicon_data;
   if (associator &&
       associator->GetSyncedFaviconForPageURL(request.request_path,
                                              &favicon_data)) {
     scoped_refptr<base::RefCountedString> response =
         new base::RefCountedString();
     response->data() = favicon_data;
-    url_data_source()->SendResponse(request.request_id, response);
+    request.callback.Run(response);
     return true;
   }
   return false;
 }