Switch GrEffect::onIsEqual signature back to GrEffect from GrEffectRef.

R=robertphillips@google.com
Review URL: https://codereview.appspot.com/7188046

git-svn-id: http://skia.googlecode.com/svn/trunk@7326 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/effects/SkMagnifierImageFilter.cpp b/src/effects/SkMagnifierImageFilter.cpp
index f5d9030..e0ab4d0 100644
--- a/src/effects/SkMagnifierImageFilter.cpp
+++ b/src/effects/SkMagnifierImageFilter.cpp
@@ -75,7 +75,7 @@
         , fXInset(xInset)
         , fYInset(yInset) {}
 
-    virtual bool onIsEqual(const GrEffectRef&) const SK_OVERRIDE;
+    virtual bool onIsEqual(const GrEffect&) const SK_OVERRIDE;
 
     GR_DECLARE_EFFECT_TEST;
 
@@ -229,7 +229,7 @@
     return GrTBackendEffectFactory<GrMagnifierEffect>::getInstance();
 }
 
-bool GrMagnifierEffect::onIsEqual(const GrEffectRef& sBase) const {
+bool GrMagnifierEffect::onIsEqual(const GrEffect& sBase) const {
     const GrMagnifierEffect& s = CastEffect<GrMagnifierEffect>(sBase);
     return (this->texture(0) == s.texture(0) &&
             this->fXOffset == s.fXOffset &&