Broke GrTessellatingPathRenderer's tessellator out into a separate file.
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1557083002

Committed: https://skia.googlesource.com/skia/+/8b05cb8a00bdb82e100f1ba74bf4de4a504cceea

Review URL: https://codereview.chromium.org/1557083002
4 files changed