[fsp] Cleanup handling errors for operation requests.

chrome/browser/chromeos/file_system_provider/operations/get_metadata.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/get_metadata.h"
 
 #include <string>
 
 #include "chrome/common/extensions/api/file_system_provider.h"
 #include "chrome/common/extensions/api/file_system_provider_internal.h"
@@ skipping 59 matching lines @@
 void GetMetadata::OnSuccess(int /* request_id */,
                             scoped_ptr<RequestValue> result,
                             bool has_more) {
   base::File::Info file_info;
   const bool convert_result =
       ConvertRequestValueToFileInfo(result.Pass(), &file_info);
   DCHECK(convert_result);
   callback_.Run(base::File::FILE_OK, file_info);
 }
 
-void GetMetadata::OnError(int /* request_id */, base::File::Error error) {
+void GetMetadata::OnError(int /* request_id */,
+                          scoped_ptr<RequestValue> /* result */,
+                          base::File::Error error) {
   callback_.Run(error, base::File::Info());
 }
 
 }  // namespace operations
 }  // namespace file_system_provider
 }  // namespace chromeos