Revert of Added varying struct

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 GrGLVarying;
-
 class GrGLGeometryBuilder : public GrGLShaderBuilder {
 public:
     GrGLGeometryBuilder(GrGLProgramBuilder* program);
-
-private:
     /*
      * an internal call for GrGLFullProgramBuilder to add varyings
      */
-    void addVarying(const char* name, GrGLVarying*);
+    void addVarying(GrSLType type,
+                   const char* name,
+                   const char** gsOutName);
 
     bool compileAndAttachShaders(GrGLuint programId, SkTDArray<GrGLuint>* shaderIds) const;
 
-    friend class GrGLProgramBuilder;
-
     typedef GrGLShaderBuilder INHERITED;
 };
 
 #endif