With the move from SkData::NewXXX to SkData::MakeXXX most SkAutoTUnref<SkData> were changed to sk_sp<SkData>. However, there are still a few SkAutoTUnref<SkData> around, so clean them up. Review-Url: https://codereview.chromium.org/2212493002
BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1685693003 Review URL: https://codereview.chromium.org/1685693003