About:tracing's code is in src/third_party/trace-viewer.
You can edit these files, recompile chrome, and things should just work.
Or you can do the power-user way:
- cd src/third_party/trace-viewer
- python -m SimpleHTTPServer
- open up http://localhost:8000/ in any version of chrome
- go to tracing/
- run any of the .html files in the tracing directory
- All my tests are failing and I haven't edited anything yet!
- Make sure you are running python -m SimpleHTTPServer from the trace-viewer directory
- This will require you to navigate to the tracing/ directory once you http://localhost:8000/