Add GrShaderFlags enum

src/gpu/gl/GrGLUniformHandler.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLUniformHandler_DEFINED
 #define GrGLUniformHandler_DEFINED
 
@@ skipping 20 matching lines @@
         , fUniforms(kUniformsPerBlock) {}
 
     UniformHandle internalAddUniformArray(uint32_t visibility,
                                           GrSLType type,
                                           GrSLPrecision precision,
                                           const char* name,
                                           bool mangleName,
                                           int arrayCount,
                                           const char** outName) override;
 
-    void appendUniformDecls(ShaderVisibility, SkString*) const override;
+    void appendUniformDecls(GrShaderFlags visibility, SkString*) const override;
 
     // Manually set uniform locations for all our uniforms.
     void bindUniformLocations(GrGLuint programID, const GrGLCaps& caps);
 
     // Updates the loction of the Uniforms if we cannot bind uniform locations manually
     void getUniformLocations(GrGLuint programID, const GrGLCaps& caps);
 
     const GrGLGpu* glGpu() const;
 
     typedef GrGLProgramDataManager::UniformInfo UniformInfo;
     typedef GrGLProgramDataManager::UniformInfoArray UniformInfoArray;
 
     UniformInfoArray fUniforms;
 
     friend class GrGLProgramBuilder;
 
     typedef GrGLSLUniformHandler INHERITED; 
 };
 
 #endif