Fix for 'unknown this' closure type error
Fix for 'unknown this' closure type error

Change-Id: I5f7040049cd985ffc809e363f0f0227bc32c95ec

shaka-project/shaka-player,tvoli/shaka-player,shaka-project/shaka-player,TheModMaker/shaka-player,tvoli/shaka-player,shaka-project/shaka-player,TheModMaker/shaka-player,TheModMaker/shaka-player,TheModMaker/shaka-player,vimond/shaka-player,tvoli/shaka-player,tvoli/shaka-player,vimond/shaka-player,shaka-project/shaka-player,vimond/shaka-player