Remove use of GrEffectRef from draw state and below.

src/core/SkXfermode.cpp

Index: src/core/SkXfermode.cpp
diff --git a/src/core/SkXfermode.cpp b/src/core/SkXfermode.cpp
index b5f95dad51bc9fca81073e6e4908c0a3243f97d2..d62602e334c359f97826083f82271ba394451192 100644
--- a/src/core/SkXfermode.cpp
+++ b/src/core/SkXfermode.cpp
@@ -971,7 +971,7 @@ public:
 
         static inline EffectKey GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&) {
             // The background may come from the dst or from a texture.
-            int numTextures = (*drawEffect.effect())->numTextures();
+            int numTextures = drawEffect.effect()->numTextures();
             SkASSERT(numTextures <= 1);
             return (drawEffect.castEffect<XferEffect>().mode() << 1) | numTextures;
         }