Initial refactor of shaderbuilder

src/gpu/gl/builders/GrGLGeometryShaderBuilder.h

+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrGLGeometryShaderBuilder_DEFINED
+#define GrGLGeometryShaderBuilder_DEFINED
+
+#include "GrGLShaderBuilder.h"
+
+class GrGLProgramBuilder;
+
+class GrGLGeometryShaderBuilder : public GrGLFullShaderBuilder {
+public:
+    GrGLGeometryShaderBuilder(GrGLFullProgramBuilder* program);
+private:
+    /*
+     * an internal call for GrGLFullProgramBuilder to add varyings
+     */
+    void addVarying(GrSLType type,
+                   const char* name,
+                   const char** gsOutName);
+
+    bool compileAndAttachShaders(GrGLuint programId, SkTDArray<GrGLuint>* shaderIds) const;
+
+    friend class GrGLFullProgramBuilder;
+    typedef GrGLFullShaderBuilder INHERITED;
+};
+
+#endif