The renderer (but not the browser process) knows which resources are ad resources. Get that information to the PageLoadMetrics so that it can measure the total byte count of ad resources on a page.
We can measure this pretty easily in Blink. Let's do that now while we're trying to figure out how to propagate the is-ad resource bit to the browser process.
Comment 1 by jkarlin@chromium.org
, Jul 9Status: Assigned (was: Available)