Request: trace-events in line-delimited json

[jasnell]

Currently the v8 trace events format uses a root object with a traceEvents property whose value is an array... e.g.

{
  "traceEvents": [
     { "pid": "..." },
     { "pid": "..." }
  ]
}

While this is ok for relatively simple traces, when the trace file becomes rather large, it becomes more difficult to work with the json object.

It would be helpful from An-Ability-To-Process-Events-As-A-Stream point of view to support new-line delimited JSON as an alternative.

e.g.

{ "pid": "..." }
{ "pid": "..." }