Add database recovery for FileSystemDirectoryDatabase.

webkit/fileapi/file_system_database_test_helper.h

+// 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.
+
+#ifndef WEBKIT_FILEAPI_FILE_SYSTEM_DATABASE_TEST_HELPER_H_
+#define WEBKIT_FILEAPI_FILE_SYSTEM_DATABASE_TEST_HELPER_H_
+
+#include <cstddef>
+
+#include "third_party/leveldatabase/src/db/filename.h"
+
+class FilePath;
+
+namespace fileapi {
+
+void CorruptDatabase(const FilePath& db_path,
+                     leveldb::FileType type,
+                     ptrdiff_t offset,
+                     size_t size);
+
+}  // namespace fileapi
+
+#endif  // WEBKIT_FILEAPI_FILE_SYSTEM_DATABASE_TEST_HELPER_H_