This comment seems unnecessarily aggressive given the code is pretty straightforward to navigate. If you were to read the source code a little further you'd ju

This comment seems unnecessarily aggressive given the code is pretty straightforward to navigate. If you were to read the source code a little further you'd jump into this code, called from OPs referenced function: https://chromium.googlesource.com/chromium/src/+/e51dcb0c148a1b0ab0080808d8d1b914d02f6057/chrome/browser/metrics/variations/variations_http_header_provider.cc#220 https://chromium.googlesource.com/chromium/src/+/e51dcb0c148... I'm not sure exactly what kind of 'proof' you're looking for , but this tracking isn't being hidden.