Revert of Create blurred RRect mask on GPU (rather than uploading it) (patchset #5 id:80001 of https://codereview.chromium.org/2222083004/ )

Reason for revert:
No NoGPU bot on commit queue ?

Original issue's description:
> Create blurred RRect mask on GPU (rather than uploading it)
>
> This CL doesn't try to resolve any of the larger issues. It just moves the computation of the blurred RRect to the gpu and sets up to start using vertex attributes for a nine patch draw (i.e., returning the texture coordinates)
>
> All blurred rrects using the "analytic" path will change slightly with this CL.
>
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2222083004
>
> Committed: https://skia.googlesource.com/skia/+/75ccdc77a70ec2083141bf9ba98eb2f01ece2479
> Committed: https://skia.googlesource.com/skia/+/94b5c5a41160e0f55e267fc3d830df65736fac50

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

Review-Url: https://codereview.chromium.org/2232953002
9 files changed