Revert 277929 "[fsp] Cleanup handling errors for operation reque..."

trunk/src/chrome/browser/chromeos/file_system_provider/operations/unmount.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/unmount.h"
 
 #include "base/values.h"
 #include "chrome/common/extensions/api/file_system_provider.h"
 
 namespace chromeos {
@@ skipping 16 matching lines @@
       extensions::api::file_system_provider::OnUnmountRequested::kEventName,
       values.Pass());
 }
 
 void Unmount::OnSuccess(int /* request_id */,
                         scoped_ptr<RequestValue> /* result */,
                         bool /* has_more */) {
   callback_.Run(base::File::FILE_OK);
 }
 
-void Unmount::OnError(int /* request_id */,
-                      scoped_ptr<RequestValue> /* result */,
-                      base::File::Error error) {
+void Unmount::OnError(int /* request_id */, base::File::Error error) {
   callback_.Run(error);
 }
 
 }  // namespace operations
 }  // namespace file_system_provider
 }  // namespace chromeos