Drop unused shader support for sample variables

Bug: skia:
Change-Id: I9e2b7da8c916703027d8dd4303ae67f4e69bcf87
Reviewed-on: https://skia-review.googlesource.com/107356
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
diff --git a/src/gpu/ops/GrAAConvexPathRenderer.cpp b/src/gpu/ops/GrAAConvexPathRenderer.cpp
index badaadd..c238d10 100644
--- a/src/gpu/ops/GrAAConvexPathRenderer.cpp
+++ b/src/gpu/ops/GrAAConvexPathRenderer.cpp
@@ -573,7 +573,7 @@
             // Setup pass through color
             varyingHandler->addPassThroughAttribute(qe.fInColor, args.fOutputColor);
 
-            GrGLSLPPFragmentBuilder* fragBuilder = args.fFragBuilder;
+            GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
 
             // Setup position
             this->writeOutputPosition(vertBuilder, gpArgs, qe.fInPosition->fName);