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

src/effects/gradients/SkLinearGradient.cpp

Index: src/effects/gradients/SkLinearGradient.cpp
diff --git a/src/effects/gradients/SkLinearGradient.cpp b/src/effects/gradients/SkLinearGradient.cpp
index 768623a2b035d69db6d4d12eca8632a92ff49c62..72b9d4792f56699f986a86ad78738435f970bf31 100644
--- a/src/effects/gradients/SkLinearGradient.cpp
+++ b/src/effects/gradients/SkLinearGradient.cpp
@@ -579,7 +579,7 @@
 
 bool SkLinearGradient::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;
 }