Revert "In GrSkSLFP, always use a coord transform"

This reverts commit 36d6c599c314e39821118ee9dbe0e02f02fb5a54.

Reason for revert: May be responsible for Chrome roll failure? (Less likely than asyncRescaleAndReadPixels, just want to be safe).

Original change's description:
> In GrSkSLFP, always use a coord transform
> 
> The old logic would use sk_FragCoord if no matrix was supplied, but this
> was just wrong. Note that many uses of this class already supply a
> matrix (runtime shader), but some don't. In those cases, child effects
> that were expecting local coords as input would produce the wrong
> results.
> 
> Change-Id: I1d1092fc6c555225ddcfc9f19f346618ef777646
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/266855
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Brian Osman <brianosman@google.com>

TBR=bsalomon@google.com,brianosman@google.com

Change-Id: Ib7fd122ac625e8f8792518d82ff4c9cbdd37e448
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/266946
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
1 file changed