Reland "Always tweak matrix for consistent opt"

This reverts commit 0a07e9b.

Reason for revert: didnt' seem to help g3

Original change's description:
> Revert "Always tweak matrix for consistent opt"
>
> This reverts commit 26e1073.
>
> Reason for revert: breaking google3?
>
> Original change's description:
> > Always tweak matrix for consistent opt
> >
> > Change-Id: Id16d4c4831724571dc0b1bd5d99e8a93b2a88ea9
> > Reviewed-on: https://skia-review.googlesource.com/c/skia/+/337724
> > Reviewed-by: Mike Klein <mtklein@google.com>
> > Commit-Queue: Mike Reed <reed@google.com>
>
> TBR=mtklein@google.com,reed@google.com
>
> Change-Id: I6200dc3478863e50d4995da952e5c35686efc42a
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/337939
> Reviewed-by: Mike Reed <reed@google.com>

TBR=mtklein@google.com,reed@google.com

# Not skipping CQ checks because this is a reland.

Change-Id: I52e97d0f5b6f5fa2c264541e9014de692fe436db
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/337941
Reviewed-by: Mike Reed <reed@google.com>

Author: reed-at-google

src/shaders/SkImageShader.cpp

@@ -920,13 +920,7 @@ skvm::Color SkImageShader::onProgram(skvm::Builder* p,
         if (lowerWeight > 0) {
             lower = &access->lowerLevel();
         }
-
-        // should we do this all the  time (not use in UseSampling?)
-        if (!fUseSamplingOptions) {
-            if (!sampling.fUseCubic) {
-                tweak_filter_and_inv_matrix(&sampling.fFilter, &upperInv);
-            }
-        }
+        tweak_filter_and_inv_matrix(&sampling.fFilter, &upperInv);
     }
 
     skvm::Coord upperLocal = SkShaderBase::ApplyMatrix(p, upperInv, origLocal, uniforms);