GitLab

Adds the ability to inject paint_preview::PaintPreviewTracker into
blink::GraphicsContext to act similarly to printing::MetafileSkia.
This class will track various metadata about the Paint Preview
capture process.

Design Doc: go/fdt-design (internal)
Part of Landing: crrev/1786583

Bug: 1008885
Change-Id: Iba2819491bee7b284de62a1bf888aa9486c788cf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1829277
Commit-Queue: Calder Kitagawa <ckitagawa@chromium.org>
Reviewed-by: Ian Vollick <vollick@chromium.org>
Auto-Submit: Calder Kitagawa <ckitagawa@chromium.org>
Cr-Commit-Position: refs/heads/master@{#703720}