The University of California at Berkeley announced Tuesday that it has created 100 endowed chairs by matching a $113 million grant from the William and Flora Hewlett Foundation. The grant was made amid concern that Berkeley risked losing star faculty members to private institutions in an era when the state could not be counted on to support faculty salaries. By endowing the chairs, the university hopes to hold on to and attract top faculty talent, which in turn is expected to attract top graduate students.