chrome/test/data/arc_graphics_tracing/trace_async_events.json

{
  "traceEvents":[],
  "systemTraceEvents":"            app1-14141 [001] ...1     1.100000: tracing_mark_write: S|1141|async1|1\n            app2-14142 [001] ...1     1.200000: tracing_mark_write: S|1142|async2|2\n            app1-14141 [001] ...1     1.300000: tracing_mark_write: F|1141|async1|1\n            app2-14142 [001] ...1     1.400000: tracing_mark_write: F|1142|async2|2\n"
}