{
   "traceEvents":[
      {
         "pid": 21975,
         "tid": 38147,
         "ts": 17376402124,
         "ph": "X",
         "cat": "toplevel",
         "name": "MessageLoop::RunTask",
         "args": {
            "src_file": "../../mojo/public/cpp/system/simple_watcher.cc",
            "src_func": "Notify"
         },
         "dur": 68,
         "tdur": 56,
         "tts": 26330
      },
      // More trace events
   ]
}