Revert of Repeating SkBitmapProcState rounding bias

src/core/SkBitmapProcState.cpp

Index: src/core/SkBitmapProcState.cpp
diff --git a/src/core/SkBitmapProcState.cpp b/src/core/SkBitmapProcState.cpp
index 6ed83002d9008f448a278e71f93eb9c2ab79ba33..487bd80402609f454b894e5e124eb5d8eb20c9eb 100644
--- a/src/core/SkBitmapProcState.cpp
+++ b/src/core/SkBitmapProcState.cpp
@@ -820,10 +820,15 @@
     SkFractionalInt fx;
     int dstY;
     {
-        const SkBitmapProcStateAutoMapper mapper(s, x, y);
+        SkPoint pt;
+        s.fInvProc(s.fInvMatrix, SkIntToScalar(x) + SK_ScalarHalf, SkIntToScalar(y) + SK_ScalarHalf,
+                   &pt);
+        fx = SkScalarToFractionalInt(pt.fY)
+            + bitmap_sampler_inv_bias(s.fInvMatrix.getScaleY());
         const unsigned maxY = s.fPixmap.height() - 1;
-        dstY = SkClampMax(SkFixedFloorToInt(mapper.y()), maxY);
-        fx = SkFixedToFractionalInt(mapper.x());
+        dstY = SkClampMax(SkFractionalIntToInt(fx), maxY);
+        fx = SkScalarToFractionalInt(pt.fX)
+            + bitmap_sampler_inv_bias(s.fInvMatrix.getScaleX());
     }
 
     const SkPMColor* SK_RESTRICT src = s.fPixmap.addr32(0, dstY);
@@ -859,3 +864,4 @@
         }
     }
 }
+