Which Canadian playwright won the Tony Award for Best Play for "The Drowsy Chaperone"?

Bob Martin is the Canadian playwright who won the Tony Award for Best Play for "The Drowsy Chaperone." This musical, which premiered in 2006, is a unique tribute to musical theatre and cleverly blends the story of a man who loves an old musical with his own life. Martin's contributions as both a co-creator and an actor in the production played a significant role in its success, earning critical acclaim and several awards.

The other individuals listed are notable playwrights and directors in their own right but are not associated with "The Drowsy Chaperone." David Mamet is well-known for his influential works in American theater that often explore themes of language and power. Trevor Nunn is a prominent British theatre director known for his adaptations and productions of classic works. Tom Stoppard is recognized for his clever, philosophical plays that frequently explore the interaction of art and life. While they have made significant contributions to theatre, it is Bob Martin who is directly connected to the winning of the Tony for this particular production.