chrome/test/data/arc_graphics_tracing/trace_time.dat

{
   "traceEvents": [
     {"pid":1,"tid":2,"ts":100000,"ph":"X","cat":"exo","name":"Surface::Commit","args":{},"dur":1,"tdur":1},
     {"pid":1,"tid":2,"ts":100001,"ph":"X","cat":"exo","name":"Surface::Commit","args":{},"dur":1,"tdur":1},
     {"pid":1,"tid":2,"ts":100002,"ph":"X","cat":"exo","name":"Surface::Commit","args":{},"dur":1,"tdur":1},
     {"pid":1,"tid":2,"ts":100003,"ph":"X","cat":"exo","name":"Surface::Commit","args":{},"dur":1,"tdur":1},
     {"pid":1,"tid":2,"ts":100004,"ph":"X","cat":"exo","name":"Surface::Commit","args":{},"dur":1,"tdur":1}
   ]
}