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/GrDitherEffect.cpp b/src/gpu/effects/GrDitherEffect.cpp
index 7409e5f..1db61ba 100644
--- a/src/gpu/effects/GrDitherEffect.cpp
+++ b/src/gpu/effects/GrDitherEffect.cpp
@@ -20,7 +20,8 @@
 class DitherEffect : public GrEffect {
 public:
     static GrEffectRef* Create() {
-        return CreateEffectRef(AutoEffectUnref(SkNEW(DitherEffect)));
+        GR_CREATE_STATIC_EFFECT(gDitherEffect, DitherEffect, ())
+        return SkRef(gDitherEffect);
     }
 
     virtual ~DitherEffect() {};