[tracing] Add trace event best practises.

This CL adds a readme to guide devs to best practises
when emitting trace events in chrome.

Change-Id: I0b59a6acd81feaae35984bf6dd97dac1b99d76bf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6709793
Reviewed-by: Eric Seckler <[email protected]>
Reviewed-by: Mikhail Khokhlov <[email protected]>
Commit-Queue: Etienne Pierre-Doray <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1485126}
NOKEYCHECK=True
GitOrigin-RevId: 52e9c708755f0a409a2755f39b62ad496998a07b
1 file changed
tree: a820630b742f59e516b507aba77aa338796b23de
  1. trace_event_common.h