mattbfb

Fix grouping of console logs

6

Summary: Chrome Dev Tools doesn't correctly display grouped console logs (i.e. console output between a `console.group` and `console.groupEnd`) when timestamps are all zero. Populate the timestamp field so grouping functions...

Summary: Move JSON parsing into the JSON helper, fixing the linux test build. Differential Revision: D56733388

## Summary ## Test Plan

## Summary ## Test Plan