No media-file validation mode for DeviceMediaAsyncUtil.

chrome/browser/chromeos/fileapi/mtp_file_system_backend_delegate.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/fileapi/mtp_file_system_backend_delegate.h"
 #include "chrome/browser/media_galleries/fileapi/device_media_async_file_util.h"
 #include "webkit/browser/blob/file_stream_reader.h"
 #include "webkit/browser/fileapi/file_stream_writer.h"
 #include "webkit/browser/fileapi/file_system_url.h"
 
 namespace chromeos {
 
 MTPFileSystemBackendDelegate::MTPFileSystemBackendDelegate(
     const base::FilePath& storage_partition_path)
     : device_media_async_file_util_(
-          DeviceMediaAsyncFileUtil::Create(storage_partition_path)) {
+          DeviceMediaAsyncFileUtil::Create(storage_partition_path,
+                                           NO_MEDIA_FILE_VALIDATION)) {
 }
 
 MTPFileSystemBackendDelegate::~MTPFileSystemBackendDelegate() {
 }
 
 fileapi::AsyncFileUtil* MTPFileSystemBackendDelegate::GetAsyncFileUtil(
     fileapi::FileSystemType type) {
   DCHECK_EQ(fileapi::kFileSystemTypeDeviceMediaAsFileStorage, type);
 
   return device_media_async_file_util_.get();
 }
 
 scoped_ptr<webkit_blob::FileStreamReader>
 MTPFileSystemBackendDelegate::CreateFileStreamReader(
     const fileapi::FileSystemURL& url,
     int64 offset,
     const base::Time& expected_modification_time,
     fileapi::FileSystemContext* context) {
   DCHECK_EQ(fileapi::kFileSystemTypeDeviceMediaAsFileStorage, url.type());
 
-  // TODO(kinaba): Returned MediaFileStreamReader verifies file header and
-  // stops reading if the stream does not represent a media file. We might
-  // want to remove the verification here since we want to mount MTP devices
-  // as normal file storage in Chrome OS file manager.
   return device_media_async_file_util_->GetFileStreamReader(
       url, offset, expected_modification_time, context);
 }
 
 scoped_ptr<fileapi::FileStreamWriter>
 MTPFileSystemBackendDelegate::CreateFileStreamWriter(
     const fileapi::FileSystemURL& url,
     int64 offset,
     fileapi::FileSystemContext* context) {
   DCHECK_EQ(fileapi::kFileSystemTypeDeviceMediaAsFileStorage, url.type());
 
   // TODO(kinaba): support writing.
   return scoped_ptr<fileapi::FileStreamWriter>();
 }
 
 }  // namespace chromeos