Added "is using GPU memory" heatmap
Added "is using GPU memory" heatmap

This patch adds a is using gpu memory heatmap for tiles.

BUG=446
R=nduca@chromium.org

Review URL: https://codereview.appspot.com/14063043
sahiljain/catapult,catapult-project/catapult,catapult-project/catapult-csm,danbeam/catapult,dstockwell/catapult,catapult-project/catapult-csm,vmpstr/trace-viewer,catapult-project/catapult,zeptonaut/catapult,modulexcite/catapult,benschmaus/catapult,catapult-project/catapult,0x90sled/catapult,catapult-project/catapult-csm,danbeam/catapult,SummerLW/Perf-Insight-Report,zeptonaut/catapult,benschmaus/catapult,scottmcmaster/catapult,vmpstr/trace-viewer,0x90sled/catapult,catapult-project/catapult,SummerLW/Perf-Insight-Report,catapult-project/catapult-csm,dstockwell/catapult,SummerLW/Perf-Insight-Report,sahiljain/catapult,sahiljain/catapult,modulexcite/catapult,scottmcmaster/catapult,danbeam/catapult,catapult-project/catapult,benschmaus/catapult,SummerLW/Perf-Insight-Report,benschmaus/catapult,benschmaus/catapult,danbeam/catapult,catapult-project/catapult-csm,SummerLW/Perf-Insight-Report,benschmaus/catapult,0x90sled/catapult,vmpstr/trace-viewer,dstockwell/catapult,sahiljain/catapult,sahiljain/catapult,catapult-project/catapult,modulexcite/catapult,scottmcmaster/catapult,benschmaus/catapult,catapult-project/catapult-csm,catapult-project/catapult,dstockwell/catapult,zeptonaut/catapult,SummerLW/Perf-Insight-Report,catapult-project/catapult-csm,sahiljain/catapult