Question: Which former Barbadian international cricketer who has represented the West Indies was bought under the contract for Chittagong Vikings' fourth season?
Context: The Chittagong Vikings are a franchise cricket team based in Chittagong, Bangladesh, which plays in the Bangladesh Premier League (BPL).  They are one of the seven teams that are competing in the 2016 Bangladesh Premier League.  The team is being captained by Tamim Iqbal.  The Vikings returned to the 4th season of the league, only retaining three players from the previous season.  Tamim Iqbal will continue as the captain of the team, with a drastic change in the management.  Due to failure in previous season, contract of Marvan Atapattu was not renewed, and Mohammad Salahuddin was appointed as the coach, who coached defending champions Comilla Victorians last season.  Chris Gayle, Dwayne Smith, Shoaib Malik and Grant Elliott were bought under the contract for the fourth season. Corey Dalanelo Collymore (born 21 December 1977) is a former Barbadian cricketer, who represented the West Indies team in both Tests and ODIs cricket as seam bowler. Stafanie Roxann Taylor, OD (born 11 June 1991) is a Jamaican cricketer who is current captain of West Indies women's cricket team.  She has represented West Indies women's cricket team over 80 times since her debut in 2008.  A right-handed batsman and off break bowler, Taylor was selected as the 2011 ICC Women's Cricketer of the Year – the first West Indian to receive the accolade.  Born in Jamaica, Taylor broke into the West Indies team in 2008, aged 17, and immediately inserted herself as a key member of the team.  She scored her highest Twenty20 total on debut, striking 90 runs from 49 balls to help her side to a large victory.  In the 2016 World Twenty20, she was the highest run-scorer and named player of the series.  She played in her 100th Women's One Day International (WODI) match, when the West Indies played India in the group stage of the 2017 Women's Cricket World Cup, on 29 June 2017. Joseph Henderson Williams (born 1 September 1974) is a former Barbadian cricketer who played several matches for Barbados during the late 1990s.  From the parish of Saint Philip, Williams represented the Barbados under-19 team at both the 1993 and 1994 West Indies Youth Championships.  He made his first-class debut for Barbados during the 1995–96 season, against Guyana in the Red Stripe Cup.  The match was washed out after one day's play, and Williams played only one further match at first-class level, against a touring Free State team the following season.  In that match, played at the Kensington Oval, Bridgetown, he took 3/57 in Free State's only innings, bowling first change behind Henry Austin and Test player Patterson Thompson. Antonio Nigel Mayers (born 23 October 1979) is a former Barbadian cricketer who represented both Barbados and West Indies B in West Indian domestic cricket.  He was an all-rounder who bowled right-arm medium pace and batted right-handed. Anderson Wendle Leandro Sealy (born 10 July 1982) is a former Barbadian cricketer who represented West Indies B and the Combined Campuses and Colleges in West Indian domestic cricket.  He played as a left-arm orthodox bowler. This is presenting a complete list in alphabetical order of cricketers who have played for Chittagong Vikings in Twenty20 matches held by the Bangladesh Premier League.  The Chittagong Vikings franchise was formed ahead of the 2015 BPL edition, replacing the former Chittagong Kings team which participated in the 2012 and 2013 BPL editions.  The list includes all players who represented the Kings.  Complying with other club lists, details are the player's name followed by his years active as a Chittagong Kings/Vikings player, current players to the end of the 2015–16 Bangladeshi cricket season. Johnson Charles (born 14 January 1989) is a St Lucian international cricketer who plays for the West Indies.  As a wicketkeeper-batsman, Charles started his ODI career against Australia in March 2012.  His first T20I came against England in September 2011, and he became just the second cricketer from the island of St Lucia to play for the West Indies (the first was Darren Sammy, who was captain in Charles' international debut).  Johnson was included in the West Indies' 15-man squad for the 2012 ICC World Twenty20 held in September and October that year. Dwayne Romel Smith (born 12 April 1983) is a former Barbadian international cricketer who has represented the West Indies.  The (part-time) all-rounder, he is known as an aggressive and powerful right-handed batsman, bowls medium pace, and is also an athletic fielder.  Smith has played for Barbados since the start of his career but has also played three seasons for Sussex from 2008–10.  He has become a sought-after Twenty20 player, making appearances in the Indian Premier League, for the Chennai Super Kings Mumbai Indians and the Deccan Chargers, and for New South Wales in the Australian domestic competition and for the Bangladesh Premier League in Khulna Royal Bengals for Pakistan Super League in Islamabad United.  In March 2017, Smith announced Kemar Andre Jamal Roach (born 30 June 1988 in Saint Lucy, Barbados) is a Barbadian international cricketer who plays for the West Indies.  He played in the 2006 U-19 Cricket World Cup in Sri Lanka and has represented the West Indies in Test and One Day International cricket.
Answer: Dwayne Smith