Make NativeMediaFileUtil an AsyncFileUtil

chrome/browser/media_galleries/fileapi/itunes/itunes_file_util.cc

 // Copyright 2013 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/media_galleries/fileapi/itunes/itunes_file_util.h"
 
 #include "webkit/browser/fileapi/file_system_file_util.h"
 #include "webkit/browser/fileapi/file_system_operation_context.h"
 #include "webkit/browser/fileapi/file_system_url.h"
 #include "webkit/common/fileapi/file_system_util.h"
 
 namespace itunes {
 
 ItunesFileUtil::ItunesFileUtil() {}
 
 ItunesFileUtil::~ItunesFileUtil() {}
 
-base::PlatformFileError ItunesFileUtil::GetFileInfo(
+base::PlatformFileError ItunesFileUtil::GetFileInfoSync(
     fileapi::FileSystemOperationContext* context,
     const fileapi::FileSystemURL& url,
     base::PlatformFileInfo* file_info,
     base::FilePath* platform_path) {
   return base::PLATFORM_FILE_ERROR_NOT_FOUND;
 }
 
-scoped_ptr<fileapi::FileSystemFileUtil::AbstractFileEnumerator>
-ItunesFileUtil::CreateFileEnumerator(
+base::PlatformFileError ItunesFileUtil::ReadDirectorySync(
     fileapi::FileSystemOperationContext* context,
-    const fileapi::FileSystemURL& url) {
+    const fileapi::FileSystemURL& url,
+    EntryList* file_list) {
   DCHECK(context);
+  DCHECK(file_list);
+  DCHECK(file_list->empty());
 
-  return scoped_ptr<fileapi::FileSystemFileUtil::AbstractFileEnumerator>(
-    new fileapi::FileSystemFileUtil::EmptyFileEnumerator);
+  return base::PLATFORM_FILE_OK;
 }
 
 base::PlatformFileError ItunesFileUtil::GetLocalFilePath(
     fileapi::FileSystemOperationContext* context,
     const fileapi::FileSystemURL& url,
     base::FilePath* local_file_path) {
   DCHECK(local_file_path);
   DCHECK(url.is_valid());
 
   NOTREACHED();
   return base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
 }
 
 }  // namespace itunes