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/effects/SkPerlinNoiseShader.cpp b/src/effects/SkPerlinNoiseShader.cpp
index 502cc07..894af42 100644
--- a/src/effects/SkPerlinNoiseShader.cpp
+++ b/src/effects/SkPerlinNoiseShader.cpp
@@ -530,9 +530,8 @@
                                SkPerlinNoiseShader::PaintingData* paintingData,
                                GrTexture* permutationsTexture, GrTexture* noiseTexture,
                                const SkMatrix& matrix, uint8_t alpha) {
-        AutoEffectUnref effect(SkNEW_ARGS(GrPerlinNoiseEffect, (type, numOctaves,
-            stitchTiles, paintingData, permutationsTexture, noiseTexture, matrix, alpha)));
-        return CreateEffectRef(effect);
+        return SkNEW_ARGS(GrPerlinNoiseEffect, (type, numOctaves, stitchTiles, paintingData,
+                                                permutationsTexture, noiseTexture, matrix, alpha));
     }
 
     virtual ~GrPerlinNoiseEffect() {