Added support for multiple parameters to Extension API callbacks.

chrome/browser/chromeos/extensions/file_browser_handler_api.cc

 // Copyright (c) 2012 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/extensions/file_browser_handler_api.h"
 
 #include "base/bind.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/message_loop_proxy.h"
@@ skipping 291 matching lines @@
       new SelectFile::Result::Result());
   result->success = success;
   if (success) {
     result->entry.reset(new FileEntryInfo());
     result->entry->file_system_name = file_system_name;
     result->entry->file_system_root = file_system_root.spec();
     result->entry->file_full_path = "/" + virtual_path.value();
     result->entry->file_is_directory = false;
   }
 
-  result_.reset(SelectFile::Result::Create(*result));
+  SetResult(SelectFile::Result::Create(*result));
   SendResponse(true);
 }
 
 FileSelector* FileHandlerSelectFileFunction::GetFileSelector() {
   FileSelector* result = file_selector_for_test_;
   if (result) {
     result->set_function_for_test(this);
     return result;
   }
   return new FileSelectorImpl(this);
 }
 
 FileSelector* FileHandlerSelectFileFunction::file_selector_for_test_ = NULL;
 
 bool FileHandlerSelectFileFunction::gesture_check_disabled_for_test_ = false;