Enable selection in unittest results list
Enable selection in unittest results list

TBR=dsinclair

Review URL: https://codereview.appspot.com/13648046
benschmaus/catapult,dstockwell/catapult,benschmaus/catapult,dstockwell/catapult,danbeam/catapult,dstockwell/catapult,SummerLW/Perf-Insight-Report,catapult-project/catapult-csm,catapult-project/catapult-csm,sahiljain/catapult,0x90sled/catapult,SummerLW/Perf-Insight-Report,modulexcite/catapult,catapult-project/catapult,dstockwell/catapult,sahiljain/catapult,benschmaus/catapult,benschmaus/catapult,catapult-project/catapult,catapult-project/catapult-csm,vmpstr/trace-viewer,SummerLW/Perf-Insight-Report,danbeam/catapult,modulexcite/catapult,scottmcmaster/catapult,sahiljain/catapult,zeptonaut/catapult,benschmaus/catapult,catapult-project/catapult,catapult-project/catapult,benschmaus/catapult,0x90sled/catapult,SummerLW/Perf-Insight-Report,catapult-project/catapult-csm,zeptonaut/catapult,catapult-project/catapult-csm,0x90sled/catapult,catapult-project/catapult,scottmcmaster/catapult,vmpstr/trace-viewer,danbeam/catapult,catapult-project/catapult,vmpstr/trace-viewer,catapult-project/catapult-csm,SummerLW/Perf-Insight-Report,sahiljain/catapult,zeptonaut/catapult,benschmaus/catapult,scottmcmaster/catapult,sahiljain/catapult,catapult-project/catapult-csm,danbeam/catapult,SummerLW/Perf-Insight-Report,modulexcite/catapult,sahiljain/catapult,catapult-project/catapult