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);
diff --git a/src/gpu/ops/GrDashOp.cpp b/src/gpu/ops/GrDashOp.cpp
index 9728aa9..fb559bb 100644
--- a/src/gpu/ops/GrDashOp.cpp
+++ b/src/gpu/ops/GrDashOp.cpp
@@ -919,7 +919,7 @@
     varyingHandler->addVarying("CircleParams", &circleParams);
     vertBuilder->codeAppendf("%s = %s;", circleParams.vsOut(), dce.inCircleParams()->fName);
 
-    GrGLSLPPFragmentBuilder* fragBuilder = args.fFragBuilder;
+    GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
     // Setup pass through color
     this->setupUniformColor(fragBuilder, uniformHandler, args.fOutputColor, &fColorUniform);
 
@@ -1122,7 +1122,7 @@
     varyingHandler->addVarying("RectParams", &inRectParams);
     vertBuilder->codeAppendf("%s = %s;", inRectParams.vsOut(), de.inRectParams()->fName);
 
-    GrGLSLPPFragmentBuilder* fragBuilder = args.fFragBuilder;
+    GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
     // Setup pass through color
     this->setupUniformColor(fragBuilder, uniformHandler, args.fOutputColor, &fColorUniform);
 
diff --git a/src/gpu/ops/GrMSAAPathRenderer.cpp b/src/gpu/ops/GrMSAAPathRenderer.cpp
index 842d710..71caa98 100644
--- a/src/gpu/ops/GrMSAAPathRenderer.cpp
+++ b/src/gpu/ops/GrMSAAPathRenderer.cpp
@@ -153,7 +153,7 @@
                                  qp.inPosition()->asShaderVar(), SkMatrix::I(),
                                  args.fFPCoordTransformHandler);
 
-            GrGLSLPPFragmentBuilder* fsBuilder = args.fFragBuilder;
+            GrGLSLFPFragmentBuilder* fsBuilder = args.fFragBuilder;
             fsBuilder->codeAppendf("if (%s.x * %s.x >= %s.y) discard;", uv.fsIn(), uv.fsIn(),
                                                                         uv.fsIn());
             fsBuilder->codeAppendf("%s = half4(1.0);", args.fOutputCoverage);
diff --git a/src/gpu/ops/GrOvalOpFactory.cpp b/src/gpu/ops/GrOvalOpFactory.cpp
index 9194f67..ecaa30d 100644
--- a/src/gpu/ops/GrOvalOpFactory.cpp
+++ b/src/gpu/ops/GrOvalOpFactory.cpp
@@ -113,7 +113,7 @@
             GrGLSLVertexBuilder* vertBuilder = args.fVertBuilder;
             GrGLSLVaryingHandler* varyingHandler = args.fVaryingHandler;
             GrGLSLUniformHandler* uniformHandler = args.fUniformHandler;
-            GrGLSLPPFragmentBuilder* fragBuilder = args.fFragBuilder;
+            GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
 
             // emit attributes
             varyingHandler->emitAttributes(cgp);
@@ -281,7 +281,7 @@
             varyingHandler->addVarying("EllipseRadii", &ellipseRadii);
             vertBuilder->codeAppendf("%s = %s;", ellipseRadii.vsOut(), egp.fInEllipseRadii->fName);
 
-            GrGLSLPPFragmentBuilder* fragBuilder = args.fFragBuilder;
+            GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
             // setup pass through color
             varyingHandler->addPassThroughAttribute(egp.fInColor, args.fOutputColor);
 
@@ -420,7 +420,7 @@
             varyingHandler->addVarying("EllipseOffsets1", &offsets1);
             vertBuilder->codeAppendf("%s = %s;", offsets1.vsOut(), diegp.fInEllipseOffsets1->fName);
 
-            GrGLSLPPFragmentBuilder* fragBuilder = args.fFragBuilder;
+            GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
             varyingHandler->addPassThroughAttribute(diegp.fInColor, args.fOutputColor);
 
             // Setup position