Improve trace2html_unittest
Improve trace2html_unittest

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