Fixed bad comment formatting in trace_model_track.
Fixed bad comment formatting in trace_model_track.

BUG=

Review URL: https://codereview.appspot.com/245090043

modulexcite/catapult,benschmaus/catapult,SummerLW/Perf-Insight-Report,dstockwell/catapult,sahiljain/catapult,benschmaus/catapult,zeptonaut/catapult,benschmaus/catapult,catapult-project/catapult-csm,catapult-project/catapult-csm,catapult-project/catapult-csm,dstockwell/catapult,0x90sled/catapult,catapult-project/catapult,sahiljain/catapult,SummerLW/Perf-Insight-Report,zeptonaut/catapult,catapult-project/catapult,catapult-project/catapult,0x90sled/catapult,danbeam/catapult,0x90sled/catapult,modulexcite/catapult,danbeam/catapult,catapult-project/catapult-csm,scottmcmaster/catapult,sahiljain/catapult,benschmaus/catapult,benschmaus/catapult,SummerLW/Perf-Insight-Report,dstockwell/catapult,catapult-project/catapult,sahiljain/catapult,scottmcmaster/catapult,catapult-project/catapult,catapult-project/catapult-csm,catapult-project/catapult,sahiljain/catapult,zeptonaut/catapult,benschmaus/catapult,dstockwell/catapult,benschmaus/catapult,catapult-project/catapult-csm,scottmcmaster/catapult,catapult-project/catapult-csm,danbeam/catapult,SummerLW/Perf-Insight-Report,SummerLW/Perf-Insight-Report,modulexcite/catapult,SummerLW/Perf-Insight-Report,danbeam/catapult,catapult-project/catapult,sahiljain/catapult