Refactor FileSystemMountPointProvider::CreateFileStream{Reader,Writer}

webkit/fileapi/isolated_mount_point_provider.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 "webkit/fileapi/isolated_mount_point_provider.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
@@ skipping 163 matching lines @@
   }
 
 #if defined(SUPPORT_MTP_DEVICE_FILESYSTEM)
   if (url.type() == kFileSystemTypeDeviceMedia)
     operation_context->set_mtp_device_delegate_url(url.filesystem_id());
 #endif
 
   return new LocalFileSystemOperation(context, operation_context.Pass());
 }
 
-webkit_blob::FileStreamReader*
+scoped_ptr<webkit_blob::FileStreamReader>
 IsolatedMountPointProvider::CreateFileStreamReader(
     const FileSystemURL& url,
     int64 offset,
     const base::Time& expected_modification_time,
     FileSystemContext* context) const {
-  return new webkit_blob::LocalFileStreamReader(
-      context->task_runners()->file_task_runner(),
-      url.path(), offset, expected_modification_time);
+  return scoped_ptr<webkit_blob::FileStreamReader>(
+      new webkit_blob::LocalFileStreamReader(
+          context->task_runners()->file_task_runner(),
+          url.path(), offset, expected_modification_time));
 }
 
-FileStreamWriter* IsolatedMountPointProvider::CreateFileStreamWriter(
+scoped_ptr<FileStreamWriter> IsolatedMountPointProvider::CreateFileStreamWriter(
     const FileSystemURL& url,
     int64 offset,
     FileSystemContext* context) const {
-  return new LocalFileStreamWriter(url.path(), offset);
+  return scoped_ptr<FileStreamWriter>(
+      new LocalFileStreamWriter(url.path(), offset));
 }
 
 FileSystemQuotaUtil* IsolatedMountPointProvider::GetQuotaUtil() {
   // No quota support.
   return NULL;
 }
 
 void IsolatedMountPointProvider::DeleteFileSystem(
     const GURL& origin_url,
     FileSystemType type,
     FileSystemContext* context,
     const DeleteFileSystemCallback& callback) {
   NOTREACHED();
   callback.Run(base::PLATFORM_FILE_ERROR_INVALID_OPERATION);
 }
 
 }  // namespace fileapi