Revert of GrFP can express distance vector field req., program builder declares variable for it

include/gpu/GrPaint.h

Index: include/gpu/GrPaint.h
diff --git a/include/gpu/GrPaint.h b/include/gpu/GrPaint.h
index ca9ba5981839f1357cc3207590808de088954e94..8be1d507445926fb39f65eae861cd4f43a6f1e09 100644
--- a/include/gpu/GrPaint.h
+++ b/include/gpu/GrPaint.h
@@ -78,11 +78,6 @@
     bool getAllowSRGBInputs() const { return fAllowSRGBInputs; }
 
     /**
-     * Does one of the fragment processors need a field of distance vectors to the nearest edge?
-     */
-    bool usesDistanceVectorField() const { return fUsesDistanceVectorField; }
-
-    /**
      * Should rendering be gamma-correct, end-to-end. Causes sRGB render targets to behave
      * as such (with linear blending), and sRGB inputs to be filtered and decoded correctly.
      */
@@ -106,7 +101,6 @@
      */
     void addColorFragmentProcessor(sk_sp<GrFragmentProcessor> fp) {
         SkASSERT(fp);
-        fUsesDistanceVectorField |= fp->usesDistanceVectorField();
         fColorFragmentProcessors.push_back(std::move(fp));
     }
 
@@ -115,7 +109,6 @@
      */
     void addCoverageFragmentProcessor(sk_sp<GrFragmentProcessor> fp) {
         SkASSERT(fp);
-        fUsesDistanceVectorField |= fp->usesDistanceVectorField();
         fCoverageFragmentProcessors.push_back(std::move(fp));
     }
 
@@ -149,7 +142,6 @@
         fAntiAlias = paint.fAntiAlias;
         fDisableOutputConversionToSRGB = paint.fDisableOutputConversionToSRGB;
         fAllowSRGBInputs = paint.fAllowSRGBInputs;
-        fUsesDistanceVectorField = paint.fUsesDistanceVectorField;
 
         fColor = paint.fColor;
         fColorFragmentProcessors = paint.fColorFragmentProcessors;
@@ -176,7 +168,6 @@
     bool                                      fAntiAlias;
     bool                                      fDisableOutputConversionToSRGB;
     bool                                      fAllowSRGBInputs;
-    bool                                      fUsesDistanceVectorField;
 
     GrColor4f                                 fColor;
 };