Add database recovery for FileSystemOriginDatabase

webkit/fileapi/file_system_util.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_UTIL_H_
 #define WEBKIT_FILEAPI_FILE_SYSTEM_UTIL_H_
 #pragma once
 
 #include "base/file_path.h"
 #include "webkit/fileapi/file_system_types.h"
@@ skipping 74 matching lines @@
 // Example:
 //   "http://www.example.com:80/"'s identifier should look like:
 //   "http_www.example.host_80"
 std::string GetOriginIdentifierFromURL(const GURL& url);
 GURL GetOriginURLFromIdentifier(const std::string& origin_identifier);
 
 // Returns the string representation of the given filesystem |type|.
 // Returns an empty string if the |type| is invalid.
 std::string GetFileSystemTypeString(FileSystemType type);
 
+// Encodes |file_path| to a string.
+// Following conditions should be held:
+//  - StringToFilePath(FilePathToString(path)) == path
+//  - StringToFilePath(FilePathToString(path) + "/" + "SubDirectory") ==
+//    path.AppendASCII("SubDirectory");
+//
+// TODO(tzik): Replace CreateFilePath and FilePathToString in
+// third_party/leveldatabase/env_chromium.cc with them.
+std::string FilePathToString(const FilePath& file_path);
+
+// Decode a file path from |file_path_string|.
+FilePath StringToFilePath(const std::string& file_path_string);
+
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_FILE_SYSTEM_UTIL_H_