Bernier, 24, played in 14 regular season games for the Kings in 2012-13. He posted a 9-3-1record, a 1.88 goals against average and a .922 save percentage.
During the NHL Lockout, he played in 13 games for Heilbronner Falken in Germany and he was also a member of Team Canada's 2012 Spengler Cup championship team.
Bernier, the Kings' nominee for the 2013 Masterton Trophy for displaying the qualities of perseverance, sportsmanship and dedication to hockey, was originally selected by Los Angeles in the first round, 11th overall, of the 2006 Entry Draft.
Frattin, 25, played in 25 regular-season games with the Maple Leafs this past season, registered seven goals and six assists for 13 points. He also this past season played in 21 games for the Toronto Marlies of the AHL during the lockout.
The Edmonton native was drafted by the Leafs in the fourth-round (99th overall) of the 2007 NHL Entry Draft.
Scrivens, 26, played in 20 games with the Maple Leafs this year, where he posted a 7-9-0 record, two shutouts, a 2.69 goals-against-average and a .915 save percentage.
In 2010 Toronto signed Scrivens after the netminder went undrafted in the annual Entry Draft.