Remove GrEffect::CreateEffectRef and GrEffect::AutoEffectRef.

R=robertphillips@google.com

Author: bsalomon@google.com

Review URL: https://codereview.chromium.org/371103003
diff --git a/src/gpu/effects/GrConvexPolyEffect.h b/src/gpu/effects/GrConvexPolyEffect.h
index 0e508c7..1a00f12 100644
--- a/src/gpu/effects/GrConvexPolyEffect.h
+++ b/src/gpu/effects/GrConvexPolyEffect.h
@@ -41,8 +41,7 @@
         if (n <= 0 || n > kMaxEdges || kHairlineAA_GrEffectEdgeType == edgeType) {
             return NULL;
         }
-        return CreateEffectRef(AutoEffectUnref(SkNEW_ARGS(GrConvexPolyEffect,
-                                                          (edgeType, n, edges))));
+        return SkNEW_ARGS(GrConvexPolyEffect, (edgeType, n, edges));
     }
 
     /**