Create GrGLSLVaryingHandler class for program building

src/gpu/glsl/GrGLSLGeometryShaderBuilder.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrGLSLGeometryShaderBuilder.h"
 #include "GrGLSLProgramBuilder.h"
+#include "GrGLSLVarying.h"
 
 GrGLSLGeometryBuilder::GrGLSLGeometryBuilder(GrGLSLProgramBuilder* program)
     : INHERITED(program) {
 
 }
 
-void GrGLSLGeometryBuilder::addVarying(const char* name,
-                                       GrSLPrecision precision,
-                                       GrGLSLVarying* 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(GrGLSLShaderVar::kVaryingIn_TypeModifier);
-        fInputs.back().setPrecision(precision);
-        fInputs.back().setUnsizedArray();
-        *fInputs.back().accessName() = v->fVsOut;
-        v->fGsIn = v->fVsOut;
-    }
-
-    if (v->fsVarying()) {
-        fOutputs.push_back();
-        fOutputs.back().setType(v->fType);
-        fOutputs.back().setTypeModifier(GrGLSLShaderVar::kVaryingOut_TypeModifier);
-        fOutputs.back().setPrecision(precision);
-        fProgramBuilder->nameVariable(fOutputs.back().accessName(), 'g', name);
-        v->fGsOut = fOutputs.back().getName().c_str();
-    }
+void GrGLSLGeometryBuilder::onFinalize() {
+    fProgramBuilder->varyingHandler()->getGeomDecls(&this->inputs(), &this->outputs());
 }