Added tree structure to GrGLFragmentProcessor, i.e. GL instances

src/effects/gradients/SkGradientShader.cpp

Index: src/effects/gradients/SkGradientShader.cpp
diff --git a/src/effects/gradients/SkGradientShader.cpp b/src/effects/gradients/SkGradientShader.cpp
index 763cef55fee2c12f76db452bf1ee865263535863..ebfa75fef54b6444f6956af67571306f46a29aa7 100644
--- a/src/effects/gradients/SkGradientShader.cpp
+++ b/src/effects/gradients/SkGradientShader.cpp
@@ -940,7 +940,7 @@ static inline void set_mul_color_uni(const GrGLProgramDataManager& pdman,
                    a);
 }
 
-void GrGLGradientEffect::setData(const GrGLProgramDataManager& pdman,
+void GrGLGradientEffect::onSetData(const GrGLProgramDataManager& pdman,
                                  const GrProcessor& processor) {
 
     const GrGradientEffect& e = processor.cast<GrGradientEffect>();