[fsp] Group arguments for API methods and events in dictionaries.

chrome/browser/chromeos/file_system_provider/operations/read_file.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/read_file.h"
 
 #include <limits>
 #include <string>
 
 #include "chrome/common/extensions/api/file_system_provider.h"
@@ skipping 44 matching lines @@
       offset_(offset),
       length_(length),
       current_offset_(0),
       callback_(callback) {
 }
 
 ReadFile::~ReadFile() {
 }
 
 bool ReadFile::Execute(int request_id) {
-  scoped_ptr<base::ListValue> values(new base::ListValue);
-  values->AppendInteger(file_handle_);
-  values->AppendDouble(offset_);
-  values->AppendInteger(length_);
+  scoped_ptr<base::DictionaryValue> values(new base::DictionaryValue);
+  values->SetInteger("openRequestId", file_handle_);
+  values->SetDouble("offset", offset_);
+  values->SetInteger("length", length_);
   return SendEvent(
       request_id,
       extensions::api::file_system_provider::OnReadFileRequested::kEventName,
       values.Pass());
 }
 
 void ReadFile::OnSuccess(int /* request_id */,
                          scoped_ptr<RequestValue> result,
                          bool has_more) {
   const int copy_result = CopyRequestValueToBuffer(
       result.Pass(), buffer_, current_offset_, length_);
   DCHECK_LE(0, copy_result);
   DCHECK(!has_more || copy_result > 0);
   if (copy_result > 0)
     current_offset_ += copy_result;
   callback_.Run(copy_result, has_more, base::File::FILE_OK);
 }
 
 void ReadFile::OnError(int /* request_id */, base::File::Error error) {
   callback_.Run(0 /* chunk_length */, false /* has_more */, error);
 }
 
 }  // namespace operations
 }  // namespace file_system_provider
 }  // namespace chromeos