Issue While creating function in PostgreSQL "ERROR: syntax error at or near "ROWTYPE""

Below is a simple procedure in PL/SQL

PROCEDURE emp_get_rec (emp_rec IN OUT NOCOPY emp_content%ROWTYPE)
  IS
    v_cnt   NUMBER;
  BEGIN
    SELECT COUNT(*)
    INTO v_cnt
    FROM emp_content
    WHERE emp_id = emp_rec.emp_id;
    IF v_cnt = 1
    THEN
      SELECT * INTO emp_rec
      FROM emp_content
      WHERE emp_id = emp_rec.emp_id;
    END IF;
 END emp_get_rec;

Which I am trying to convert in PostgreSQL,

Create or replace function emp_get_rec (emp_rec IN OUT emp_content%ROWTYPE)
AS $BODY$
DECLARE
    v_cnt   NUMBER;
BEGIN

       SELECT COUNT(*)
    INTO v_cnt
    FROM emp_content
    WHERE emp_id = emp_rec.emp_id;
    IF v_cnt = 1
    THEN
      SELECT * INTO emp_rec
      FROM emp_content
      WHERE emp_id = emp_rec.emp_id;
    END IF;
 END;
$BODY$ LANGUAGE 'plpgsql';

I am facing following error:

ERROR: syntax error at or near "ROWTYPE"