Plumb drawArc to SkDevice.

Plumbs the drawArc canvas method down to SkDevice without converting to a path. Plumbs through the various recording canvas classes.

BUG=skia:5227
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2257023003

Review-Url: https://codereview.chromium.org/2257023003
34 files changed