Add GrShaderFlags enum

src/gpu/glsl/GrGLSLUniformHandler.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 GrGLSLUniformHandler_DEFINED
 #define GrGLSLUniformHandler_DEFINED
 
 #include "GrGLSLProgramDataManager.h"
 #include "GrGLSLShaderVar.h"
 
 class GrGLSLProgramBuilder;
 
 class GrGLSLUniformHandler {
 public:
-    enum ShaderVisibility {
-        kVertex_Visibility   = 1 << kVertex_GrShaderType,
-        kGeometry_Visibility = 1 << kGeometry_GrShaderType,
-        kFragment_Visibility = 1 << kFragment_GrShaderType,
-    };
-
     virtual ~GrGLSLUniformHandler() {}
 
     typedef GrGLSLProgramDataManager::UniformHandle UniformHandle;
 
     /** Add a uniform variable to the current program, that has visibility in one or more shaders.
-        visibility is a bitfield of ShaderVisibility values indicating from which shaders the
-        uniform should be accessible. At least one bit must be set. Geometry shader uniforms are not
+        visibility is a bitfield of GrShaderFlag values indicating from which shaders the uniform
+        should be accessible. At least one bit must be set. Geometry shader uniforms are not
         supported at this time. The actual uniform name will be mangled. If outName is not nullptr
         then it will refer to the final uniform name after return. Use the addUniformArray variant
         to add an array of uniforms. */
     UniformHandle addUniform(uint32_t visibility,
                              GrSLType type,
                              GrSLPrecision precision,
                              const char* name,
                              const char** outName = nullptr) {
         return this->addUniformArray(visibility, type, precision, name, 0, outName);
     }
@@ skipping 22 matching lines @@
 
 private:
     virtual UniformHandle internalAddUniformArray(uint32_t visibility,
                                                   GrSLType type,
                                                   GrSLPrecision precision,
                                                   const char* name,
                                                   bool mangleName,
                                                   int arrayCount,
                                                   const char** outName) = 0;
 
-    virtual void appendUniformDecls(ShaderVisibility, SkString*) const = 0;
+    virtual void appendUniformDecls(GrShaderFlags visibility, SkString*) const = 0;
 
     friend class GrGLSLProgramBuilder;
 };
 
 #endif