SyncFS: Convert WAPI ResourceID to DriveAPI FileID

chrome/browser/sync_file_system/drive/metadata_db_migration_util.h

+// Copyright 2013 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 CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_METADATA_DB_MIGRATION_UTIL_H_
+#define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_METADATA_DB_MIGRATION_UTIL_H_
+
+#include <string>
+
+#include "chrome/browser/sync_file_system/sync_file_system.pb.h"
+#include "third_party/leveldatabase/src/include/leveldb/db.h"
+#include "webkit/fileapi/syncable/sync_status_code.h"
+
+namespace sync_file_system {
+namespace drive {
+
+// Adds "file:" prefix to WAPI resource ID.
+// If |resource_id| already has a prefix, just return it.
+//
+// EXAMPLE:
+//   "xxx"         =>  "file:xxx"
+//   "file:yyy"    =>  "file:yyy"
+//   "folder:zzz"  =>  "folder:zzz"
+std::string AddWapiFilePrefix(const std::string& resource_id);
+
+// Adds "folder:" prefix to WAPI resource ID.
+// If |resource_id| already has a prefix, just return it.
+//
+// EXAMPLE:
+//   "xxx"         =>  "folder:xxx"
+//   "file:yyy"    =>  "file:yyy"
+//   "folder:zzz   =>  "folder:zzz"
+std::string AddWapiFolderPrefix(const std::string& resource_id);
+
+// Adds a prefix corresponding to the given |type|.
+std::string AddWapiIdPrefix(const std::string& resource_id,
+                            DriveMetadata_ResourceType type);
+
+// Removes a prefix from WAPI resource ID.
+//
+// EXAMPLE:
+//   "file:xxx"    =>  "xxx"
+//   "folder:yyy"  =>  "yyy"
+//   "zzz"         =>  "zzz"
+std::string RemoveWapiIdPrefix(const std::string& resource_id);
+
+// Migrate |db| scheme from version 1 to version 2.
+SyncStatusCode MigrateDatabaseFromV1ToV2(leveldb::DB* db);
+
+}  // namespace drive
+}  // namespace sync_file_system
+
+#endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_METADATA_DB_MIGRATION_UTIL_H_