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

include/core/SkXfermode.h

Index: include/core/SkXfermode.h
diff --git a/include/core/SkXfermode.h b/include/core/SkXfermode.h
index 74fd9f85f7c3a56d80d38231a263e423ac1d46bd..c0a6572ec79161500ec15109f7fc26a62b970072 100644
--- a/include/core/SkXfermode.h
+++ b/include/core/SkXfermode.h
@@ -13,7 +13,7 @@
 #include "SkFlattenable.h"
 #include "SkColor.h"
 
-class GrEffect;
+class GrEffectRef;
 class GrTexture;
 class SkString;
 
@@ -198,7 +198,7 @@
         fragment shader. If NULL, the effect should request access to destination color
         (setWillReadDstColor()), and use that in the fragment shader (builder->dstColor()).
      */
-    virtual bool asNewEffect(GrEffect** effect, GrTexture* background = NULL) const;
+    virtual bool asNewEffect(GrEffectRef** effect, GrTexture* background = NULL) const;
 
     /** Returns true if the xfermode can be expressed as coeffs (src, dst), or as an effect
         (effect). This helper calls the asCoeff() and asNewEffect() virtuals. If the xfermode is
@@ -206,7 +206,7 @@
         simply test the return value.  effect, src, and dst must all be NULL or all non-NULL.
      */
     static bool AsNewEffectOrCoeff(SkXfermode*,
-                                   GrEffect** effect,
+                                   GrEffectRef** effect,
                                    Coeff* src,
                                    Coeff* dst,
                                    GrTexture* background = NULL);