google/tracing-framework — pull request #52 by benvanik (2012-12-05 21:01:18+00:00)
Title: Initial implementation of the wtf-json format.

This centralizes some EventType stuff in the trace listener, adds some support for the JSON data plumbing, and adds an initial pass of the JSON trace source.
There's a lot of code that should be shared between the binary/json sources, and bugs that were copied into the trace source, but this allows for a functional load of a JSON file merged with a binary one.