Don't drop debug_info when posting to sync server fails

sync/engine/download.h

 // Copyright 2013 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 SYNC_ENGINE_DOWNLOAD_H_
 #define SYNC_ENGINE_DOWNLOAD_H_
 
 #include "sync/base/sync_export.h"
 #include "sync/engine/sync_directory_update_handler.h"
 #include "sync/internal_api/public/base/model_type.h"
@@ skipping 64 matching lines @@
     UpdateHandlerMap* update_handler_map,
     sync_pb::GetUpdatesMessage* get_updates);
 
 // Sends the specified message to the server and stores the response in a member
 // of the |session|'s StatusController.
 SYNC_EXPORT_PRIVATE SyncerError
     ExecuteDownloadUpdates(ModelTypeSet request_types,
                            sessions::SyncSession* session,
                            sync_pb::ClientToServerMessage* msg);
 
-// Helper function to append client debug info to the message, but only do so
-// once per sync cycle.  Defined here for testing.
-void SYNC_EXPORT_PRIVATE AppendClientDebugInfoIfNeeded(
+// Helper function to copy client debug info from debug_info_getter to
+// debug_info.  Defined here for testing.
+void SYNC_EXPORT_PRIVATE CopyClientDebugInfo(
     sessions::DebugInfoGetter* debug_info_getter,
-    sessions::StatusController* status,
     sync_pb::DebugInfo* debug_info);
 
 }  // namespace download
 
 }  // namespace syncer
 
 #endif  // SYNC_ENGINE_DOWNLOAD_H_