Minor change to Ganesh path renderers

In large part this is an attempt to get non-substantive changes out of https://codereview.chromium.org/2092893003/ (Retract PipelineBuilder some more)

All the other parameters extracted from DrawPathArgs are passed around by reference except for the userStencilSettings

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2167183002

Review-Url: https://codereview.chromium.org/2167183002
9 files changed