Code to migrate a single directory from the old sandbox to the new.

webkit/fileapi/file_system_directory_database.h

 // Copyright (c) 2011 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_DIRECTORY_DATABASE_H
 #define WEBKIT_FILEAPI_FILE_SYSTEM_DIRECTORY_DATABASE_H
 
 #include <string>
 #include <vector>
 
@@ skipping 62 matching lines @@
   // another file [also not a directory]; we need to alter two files' info in a
   // single transaction to avoid weird backing file references in the event of a
   // partial failure.
   bool OverwritingMoveFile(FileId src_file_id, FileId dest_file_id);
 
   // This produces the series 0, 1, 2..., starting at 0 when the underlying
   // filesystem is first created, and maintaining state across
   // creation/destruction of FileSystemDirectoryDatabase objects.
   bool GetNextInteger(int64* next);
 
+  static bool DestroyDatabase(const FilePath& path);
+
  private:
   bool Init();
   bool StoreDefaultValues();
   bool GetLastFileId(FileId* file_id);
   bool VerifyIsDirectory(FileId file_id);
   bool AddFileInfoHelper(
       const FileInfo& info, FileId file_id, leveldb::WriteBatch* batch);
   bool RemoveFileInfoHelper(FileId file_id, leveldb::WriteBatch* batch);
   void HandleError(leveldb::Status status);
 
   std::string path_;
   scoped_ptr<leveldb::DB> db_;
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_FILE_SYSTEM_DIRECTORY_DATABASE_H