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/gradients/SkTwoPointRadialGradient.cpp b/src/effects/gradients/SkTwoPointRadialGradient.cpp
index 3507c89..22feb71 100644
--- a/src/effects/gradients/SkTwoPointRadialGradient.cpp
+++ b/src/effects/gradients/SkTwoPointRadialGradient.cpp
@@ -438,8 +438,7 @@
                                const SkTwoPointRadialGradient& shader,
                                const SkMatrix& matrix,
                                SkShader::TileMode tm) {
-        AutoEffectUnref effect(SkNEW_ARGS(GrRadial2Gradient, (ctx, shader, matrix, tm)));
-        return CreateEffectRef(effect);
+        return SkNEW_ARGS(GrRadial2Gradient, (ctx, shader, matrix, tm));
     }
 
     virtual ~GrRadial2Gradient() { }