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/gpu/effects/GrSimpleTextureEffect.h b/src/gpu/effects/GrSimpleTextureEffect.h
index b7466b4..ffc05e5 100644
--- a/src/gpu/effects/GrSimpleTextureEffect.h
+++ b/src/gpu/effects/GrSimpleTextureEffect.h
@@ -54,7 +54,7 @@
     GrSimpleTextureEffect(GrTexture* texture, const SkMatrix& matrix, const GrTextureParams& params)
         : GrSingleTextureEffect(texture, matrix, params) {}
 
-    virtual bool onIsEqual(const GrEffectRef& other) const SK_OVERRIDE {
+    virtual bool onIsEqual(const GrEffect& other) const SK_OVERRIDE {
         const GrSimpleTextureEffect& ste = CastEffect<GrSimpleTextureEffect>(other);
         return this->hasSameTextureParamsAndMatrix(ste);
     }