fix up GrGLProgrambuilder precision on varyings

src/gpu/gl/builders/GrGLGeometryShaderBuilder.cpp

Index: src/gpu/gl/builders/GrGLGeometryShaderBuilder.cpp
diff --git a/src/gpu/gl/builders/GrGLGeometryShaderBuilder.cpp b/src/gpu/gl/builders/GrGLGeometryShaderBuilder.cpp
index b20575259b841aac293f3e776d054ff51de053b1..ddbc9302e85bc2048d9660ccb44540f5e7fc2b27 100644
--- a/src/gpu/gl/builders/GrGLGeometryShaderBuilder.cpp
+++ b/src/gpu/gl/builders/GrGLGeometryShaderBuilder.cpp
@@ -14,13 +14,14 @@ GrGLGeometryBuilder::GrGLGeometryBuilder(GrGLProgramBuilder* program)
 
 }
 
-void GrGLGeometryBuilder::addVarying(const char* name, GrGLVarying* v) {
+void GrGLGeometryBuilder::addVarying(const char* name, GrSLPrecision precision, GrGLVarying* v) {
     // if we have a GS take each varying in as an array
     // and output as non-array.
     if (v->vsVarying()) {
         fInputs.push_back();
         fInputs.back().setType(v->fType);
         fInputs.back().setTypeModifier(GrGLShaderVar::kVaryingIn_TypeModifier);
+        fInputs.back().setPrecision(precision);
         fInputs.back().setUnsizedArray();
         *fInputs.back().accessName() = v->fVsOut;
         v->fGsIn = v->fVsOut;
@@ -30,6 +31,7 @@ void GrGLGeometryBuilder::addVarying(const char* name, GrGLVarying* v) {
         fOutputs.push_back();
         fOutputs.back().setType(v->fType);
         fOutputs.back().setTypeModifier(GrGLShaderVar::kVaryingOut_TypeModifier);
+        fOutputs.back().setPrecision(precision);
         fProgramBuilder->nameVariable(fOutputs.back().accessName(), 'g', name);
         v->fGsOut = fOutputs.back().getName().c_str();
     }