Users would like to display application-specific intervals on the timeline. Re-using console.time() and console.timeEnd() for this looks like the cheapest option.
Created attachment 150585 [details]
Created attachment 150586 [details]
Comment on attachment 150586 [details]
View in context: https://bugs.webkit.org/attachment.cgi?id=150586&action=review
> +localizedStrings["Stop Timing"] = "Stop Timing";
The name is misleading. I'd call these Time and TimeEnd.
Committed r121763: <http://trac.webkit.org/changeset/121763>