Revert of Screenspace AA tessellated path rendering. (patchset #37 id:730001 of https://codereview.chromium.org/1152733009/ )

Reason for revert:
Causing asserts in GLPrograms test on Mac.

Original issue's description:
> Screenspace AA tessellated GPU path rendering.
>
> This is an approach to antialiased concave path rendering
> on the GPU without using MSAA. It uses GrTessellator to
> extract boundary contours from the given path, then
> inflates by half a pixel in screen space each direction,
> then renders the result with zero alpha on the outer
> contour and one alpha on in the inner contour. This
> requires two passes through the tessellation code: one
> to extract the boundaries, then one to tessellate the
> result.
>
> This gives approximately a 3X improvement on the IE
> chalkboard demo in non-MSAA mode, a 30-40% improvement
> on MotionMark's "Fill Paths", and a ~3X improvement on
> MotionMark's "canvas arcTo segments".
>
> It works best for large, simple paths, so there's currently
> a limit of 10 verbs in the onCanDrawPath() check. This
> dovetails nicely with the distance field path renderer's
> support for small, detailed (and cached) paths.
>
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1152733009
>
> Committed: https://skia.googlesource.com/skia/+/9992bdef8ae97b3e5b109d278ccfab84c66bcbf0

TBR=bsalomon@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review-Url: https://codereview.chromium.org/2299683002

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