[fsp] Cleanup handling errors for operation requests.

chrome/browser/chromeos/file_system_provider/operations/unmount.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_UNMOUNT_H_
 #define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_UNMOUNT_H_
 
 #include "base/files/file.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/chromeos/file_system_provider/operations/operation.h"
@@ skipping 21 matching lines @@
   Unmount(extensions::EventRouter* event_router,
           const ProvidedFileSystemInfo& file_system_info,
           const fileapi::AsyncFileUtil::StatusCallback& callback);
   virtual ~Unmount();
 
   // Operation overrides.
   virtual bool Execute(int request_id) OVERRIDE;
   virtual void OnSuccess(int request_id,
                          scoped_ptr<RequestValue> result,
                          bool has_more) OVERRIDE;
-  virtual void OnError(int request_id, base::File::Error error) OVERRIDE;
+  virtual void OnError(int request_id,
+                       scoped_ptr<RequestValue> result,
+                       base::File::Error error) OVERRIDE;
 
  private:
   const fileapi::AsyncFileUtil::StatusCallback callback_;
 
   DISALLOW_COPY_AND_ASSIGN(Unmount);
 };
 
 }  // namespace operations
 }  // namespace file_system_provider
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_UNMOUNT_H_