[fsp] Use auto generated methods for generating dictionaries.

chrome/browser/chromeos/file_system_provider/operations/operation.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/operation.h"
 
 #include "chrome/browser/chromeos/file_system_provider/provided_file_system_info.h"
 #include "extensions/browser/event_router.h"
 
 namespace chromeos {
@@ skipping 26 matching lines @@
 Operation::~Operation() {
 }
 
 void Operation::SetDispatchEventImplForTesting(
     const DispatchEventImplCallback& callback) {
   dispatch_event_impl_ = callback;
 }
 
 bool Operation::SendEvent(int request_id,
                           const std::string& event_name,
-                          scoped_ptr<base::DictionaryValue> options) {
-  options->SetString("fileSystemId", file_system_info_.file_system_id());
-  options->SetInteger("requestId", request_id);
-
-  scoped_ptr<base::ListValue> event_args(new base::ListValue);
-  event_args->Append(options.release());
-
+                          scoped_ptr<base::ListValue> event_args) {
   return dispatch_event_impl_.Run(
       make_scoped_ptr(new extensions::Event(event_name, event_args.Pass())));
 }
 
 }  // namespace operations
 }  // namespace file_system_provider
 }  // namespace chromeos