fix up GrGLProgrambuilder precision on varyings

src/gpu/gl/builders/GrGLProgramBuilder.cpp

Index: src/gpu/gl/builders/GrGLProgramBuilder.cpp
diff --git a/src/gpu/gl/builders/GrGLProgramBuilder.cpp b/src/gpu/gl/builders/GrGLProgramBuilder.cpp
index c1ba97ad70c20316aba1685b11973a894f097854..491c34b79bbf6924d4e327f149189860551464f8 100644
--- a/src/gpu/gl/builders/GrGLProgramBuilder.cpp
+++ b/src/gpu/gl/builders/GrGLProgramBuilder.cpp
@@ -65,16 +65,16 @@ GrGLProgramBuilder::GrGLProgramBuilder(GrGLGpu* gpu, const DrawArgs& args)
 
 void GrGLProgramBuilder::addVarying(const char* name,
                                     GrGLVarying* varying,
-                                    GrSLPrecision fsPrecision) {
+                                    GrSLPrecision precision) {
     SkASSERT(varying);
     if (varying->vsVarying()) {
-        fVS.addVarying(name, varying);
+        fVS.addVarying(name, precision, varying);
     }
     if (this->primitiveProcessor().willUseGeoShader()) {
-        fGS.addVarying(name, varying);
+        fGS.addVarying(name, precision, varying);
     }
     if (varying->fsVarying()) {
-        fFS.addVarying(varying, fsPrecision);
+        fFS.addVarying(varying, precision);
     }
 }