FileSystemURLToMetadataKey  452 chrome/browser/sync_file_system/drive_backend_v1/drive_metadata_store.cc   batch->Put(FileSystemURLToMetadataKey(url), value);
FileSystemURLToMetadataKey  468 chrome/browser/sync_file_system/drive_backend_v1/drive_metadata_store.cc     batch->Delete(FileSystemURLToMetadataKey(url));