[fsp] Cleanup handling errors for operation requests.

chrome/browser/chromeos/file_system_provider/operations/read_directory.cc

 // Copyright 2014 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/chromeos/file_system_provider/operations/read_directory.h"
 
 #include <string>
 
 #include "base/memory/linked_ptr.h"
 #include "chrome/common/extensions/api/file_system_provider.h"
@@ skipping 66 matching lines @@
 void ReadDirectory::OnSuccess(int /* request_id */,
                               scoped_ptr<RequestValue> result,
                               bool has_more) {
   fileapi::AsyncFileUtil::EntryList entry_list;
   const bool convert_result =
       ConvertRequestValueToEntryList(result.Pass(), &entry_list);
   DCHECK(convert_result);
   callback_.Run(base::File::FILE_OK, entry_list, has_more);
 }
 
-void ReadDirectory::OnError(int /* request_id */, base::File::Error error) {
+void ReadDirectory::OnError(int /* request_id */,
+                            scoped_ptr<RequestValue> /* result */,
+                            base::File::Error error) {
   callback_.Run(
       error, fileapi::AsyncFileUtil::EntryList(), false /* has_more */);
 }
 
 }  // namespace operations
 }  // namespace file_system_provider
 }  // namespace chromeos