Fix closure compiler warnings/errors
Fix closure compiler warnings/errors

Change-Id: I9851388524d75bc993c71803c0004712c034474f

codeprogression/Cast-Player-Sample,PhilSSOO/061717Cust,PhilSSOO/061717Cust,googlecast/Cast-Player-Sample,yakupme/Cast-Player-Sample,googlecast/Cast-Player-Sample,codeprogression/Cast-Player-Sample,yakupme/Cast-Player-Sample