question: @ Override public void onBackup ( ParcelFileDescriptor oldState , BackupDataOutput data , ParcelFileDescriptor newState ) throws IOException { long savedFileSize = - 1 ; long savedCrc = - 1 ; int savedVersion = - 1 ; DataInputStream in = new DataInputStream ( new FileInputStream ( oldState . getFileDescriptor ( ) ) ) ; try { savedFileSize = in . readLong ( ) ; savedCrc = in . readLong ( ) ; savedVersion = in . readInt ( ) ; } catch ( EOFException e ) { return ; } finally { if ( in != null ) { in . close ( ) ; } } writeBackupState ( savedFileSize , savedCrc , newState ) ; }
target:  This simply preserves the existing state as we now prefer Chrome Sync to handle bookmark backup.