Add GrShaderFlags enum

src/core/SkColorMatrixFilterRowMajor255.cpp

Index: src/core/SkColorMatrixFilterRowMajor255.cpp
diff --git a/src/core/SkColorMatrixFilterRowMajor255.cpp b/src/core/SkColorMatrixFilterRowMajor255.cpp
index 33bf0422339080c40c45c47cb6b81d5bae9bf4fa..3b79d7f42c479909d3f0ddcce08a2358646c0085 100644
--- a/src/core/SkColorMatrixFilterRowMajor255.cpp
+++ b/src/core/SkColorMatrixFilterRowMajor255.cpp
@@ -257,10 +257,10 @@ public:
 
         void emitCode(EmitArgs& args) override {
             GrGLSLUniformHandler* uniformHandler = args.fUniformHandler;
-            fMatrixHandle = uniformHandler->addUniform(GrGLSLUniformHandler::kFragment_Visibility,
+            fMatrixHandle = uniformHandler->addUniform(kFragment_GrShaderFlag,
                                                        kMat44f_GrSLType, kDefault_GrSLPrecision,
                                                        "ColorMatrix");
-            fVectorHandle = uniformHandler->addUniform(GrGLSLUniformHandler::kFragment_Visibility,
+            fVectorHandle = uniformHandler->addUniform(kFragment_GrShaderFlag,
                                                        kVec4f_GrSLType, kDefault_GrSLPrecision,
                                                        "ColorMatrixVector");