fix up GrGLProgrambuilder precision on varyings

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(const char* name, GrSLPrecision precision, GrGLVarying*);
 
     bool compileAndAttachShaders(GrGLuint programId, SkTDArray<GrGLuint>* shaderIds);
 
     friend class GrGLProgramBuilder;
 
     typedef GrGLShaderBuilder INHERITED;
 };
 
 #endif