Revert of Make GrDrawState and GrPaint take GrEffect* instead of GrEffectRef*.

src/effects/SkAlphaThresholdFilter.cpp

Index: src/effects/SkAlphaThresholdFilter.cpp
diff --git a/src/effects/SkAlphaThresholdFilter.cpp b/src/effects/SkAlphaThresholdFilter.cpp
index 0bc906dae9995920d9ba8d09d132bbf81b4f8c54..6fcd2b4351e238b51ffc5588f58ad79a5c38c163 100644
--- a/src/effects/SkAlphaThresholdFilter.cpp
+++ b/src/effects/SkAlphaThresholdFilter.cpp
@@ -24,7 +24,7 @@
     virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context&,
                                SkBitmap* result, SkIPoint* offset) const SK_OVERRIDE;
 #if SK_SUPPORT_GPU
-    virtual bool asNewEffect(GrEffect** effect, GrTexture* texture,
+    virtual bool asNewEffect(GrEffectRef** effect, GrTexture* texture,
                              const SkMatrix& matrix, const SkIRect& bounds) const SK_OVERRIDE;
 #endif
 
@@ -248,7 +248,7 @@
 }
 
 #if SK_SUPPORT_GPU
-bool SkAlphaThresholdFilterImpl::asNewEffect(GrEffect** effect, GrTexture* texture,
+bool SkAlphaThresholdFilterImpl::asNewEffect(GrEffectRef** effect, GrTexture* texture,
                                              const SkMatrix& in_matrix, const SkIRect&) const {
     if (effect) {
         GrContext* context = texture->getContext();