Revert "GrTessellator: when sanitizing contours, remove non-finite points."

This reverts commit 620cc248517a509040d3f94f29710edf3a151c5b.

Reason for revert: Breaking the Vulkan bots

Original change's description:
> GrTessellator: when sanitizing contours, remove non-finite points.
> 
> NaNs can't be correctly sorted.
> 
> Bug: 757650
> Change-Id: Id1ca2fe1d1de7884da2a64ceef9491b1da7e8e77
> Reviewed-on: https://skia-review.googlesource.com/37220
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Stephen White <senorblanco@chromium.org>

TBR=bsalomon@google.com,senorblanco@chromium.org

Change-Id: I64d5c35801f844b31745a9c7ff60812d96af5e55
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 757650
Reviewed-on: https://skia-review.googlesource.com/37540
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
2 files changed