Add GrShaderFlags enum

src/gpu/glsl/GrGLSLXferProcessor.cpp

Index: src/gpu/glsl/GrGLSLXferProcessor.cpp
diff --git a/src/gpu/glsl/GrGLSLXferProcessor.cpp b/src/gpu/glsl/GrGLSLXferProcessor.cpp
index 9d2538f0818e791b2da4f18da213f011e202d680..c4b62be525c600055a62e1d178b7cd0394a6d6fc 100644
--- a/src/gpu/glsl/GrGLSLXferProcessor.cpp
+++ b/src/gpu/glsl/GrGLSLXferProcessor.cpp
@@ -36,12 +36,12 @@ void GrGLSLXferProcessor::emitCode(const EmitArgs& args) {
         const char* dstTopLeftName;
         const char* dstCoordScaleName;
 
-        fDstTopLeftUni = uniformHandler->addUniform(GrGLSLUniformHandler::kFragment_Visibility,
+        fDstTopLeftUni = uniformHandler->addUniform(kFragment_GrShaderFlag,
                                                     kVec2f_GrSLType,
                                                     kDefault_GrSLPrecision,
                                                     "DstTextureUpperLeft",
                                                     &dstTopLeftName);
-        fDstScaleUni = uniformHandler->addUniform(GrGLSLUniformHandler::kFragment_Visibility,
+        fDstScaleUni = uniformHandler->addUniform(kFragment_GrShaderFlag,
                                                   kVec2f_GrSLType,
                                                   kDefault_GrSLPrecision,
                                                   "DstTextureCoordScale",