Minor style cleanup in TTML parser
Minor style cleanup in TTML parser

I find this much more readable.

Change-Id: I80ab374e5cef8cb50a4fc15c6fdae006fd78823c

tvoli/shaka-player,tvoli/shaka-player,tvoli/shaka-player,tvoli/shaka-player,shaka-project/shaka-player,shaka-project/shaka-player,shaka-project/shaka-player,shaka-project/shaka-player