[fsp] Cleanup handling errors for operation requests.

chrome/browser/chromeos/file_system_provider/operations/operation.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_OPERATION_H_
 #define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_OPERATION_H_
 
 #include <string>
 
 #include "base/files/file.h"
@@ skipping 23 matching lines @@
 
   Operation(extensions::EventRouter* event_router,
             const ProvidedFileSystemInfo& file_system_info);
   virtual ~Operation();
 
   // RequestManager::HandlerInterface overrides.
   virtual bool Execute(int request_id) OVERRIDE = 0;
   virtual void OnSuccess(int request_id,
                          scoped_ptr<RequestValue> result,
                          bool has_more) OVERRIDE = 0;
-  virtual void OnError(int request_id, base::File::Error error) OVERRIDE = 0;
+  virtual void OnError(int request_id,
+                       scoped_ptr<RequestValue> result,
+                       base::File::Error error) OVERRIDE = 0;
 
   // Sets custom dispatchign event implementation for tests.
   void SetDispatchEventImplForTesting(
       const DispatchEventImplCallback& callback);
 
  protected:
   // Sends an event to the providing extension. Automatically adds the file
   // system id and the request id fields. Returns false, if the providing
   // extension does not handle the |event_name| event.
   bool SendEvent(int request_id,
                  const std::string& event_name,
                  scoped_ptr<base::DictionaryValue> options);
 
   ProvidedFileSystemInfo file_system_info_;
 
  private:
   DispatchEventImplCallback dispatch_event_impl_;
   DISALLOW_COPY_AND_ASSIGN(Operation);
 };
 
 }  // namespace operations
 }  // namespace file_system_provider
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_OPERATION_H_