Running mysql_upgrade did the trick. Sorry!
C:\Program Files\MariaDB 10.0\bin>mysql_upgrade -uroot -p --port=3313
Enter password: ********
Phase 1/3: Fixing table and database names
Phase 2/3: Checking and upgrading tables
Processing databases
information_schema
mysql
mysql.columns_priv OK
mysql.db OK
..
..
Phase 3/3: Running 'mysql_fix_privilege_tables'...
OK
C:\Program Files\MariaDB 10.0\bin>mysql -uroot -p --port=3313
Enter password: ********
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 13
Server version: 10.0.8-MariaDB
mariadb.org binary distribution
Copyright (c) 2000, 2013, Oracle, Monty Program Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]> use performance_schema;
Database changed
MariaDB [performance_schema]> show tables like 'session%';
+-----------------------------------------+
| Tables_in_performance_schema (session%) |
+-----------------------------------------+
| session_account_connect_attrs |
| session_connect_attrs |
+-----------------------------------------+
2 rows in set (0.00 sec)
MariaDB [performance_schema]> exit
Bye
C:\Program Files\MariaDB 10.0\bin>