Revert of Make GrDrawState and GrPaint take GrEffect* instead of GrEffectRef*.

src/effects/gradients/SkSweepGradient.cpp

Index: src/effects/gradients/SkSweepGradient.cpp
diff --git a/src/effects/gradients/SkSweepGradient.cpp b/src/effects/gradients/SkSweepGradient.cpp
index 3b54ac8ae993e16378a376e54241f8d10d29d280..154e3a2f13850d6a54a87c20b9681fd379f97a05 100644
--- a/src/effects/gradients/SkSweepGradient.cpp
+++ b/src/effects/gradients/SkSweepGradient.cpp
@@ -310,7 +310,7 @@
 
 bool SkSweepGradient::asNewEffect(GrContext* context, const SkPaint& paint,
                                   const SkMatrix* localMatrix, GrColor* grColor,
-                                  GrEffect** grEffect)  const {
+                                  GrEffectRef** grEffect)  const {
     SkDEBUGFAIL("Should not call in GPU-less build");
     return false;
 }