Add GrContextOption to disable distance field path renderer

We're going to hide the path renderer bitfield behind a testing-only flag,
but clients may want to suppress this path renderer in particular, so a
dedicated flag makes sense.

Bug: skia:
Change-Id: I6cc4049243b5d3c129a824dfe7c1a65a70a05ccd
Reviewed-on: https://skia-review.googlesource.com/40083
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
2 files changed