Auto-compare GrProcessors' texture accesses in isEqual().

src/gpu/effects/GrSimpleTextureEffect.h

Index: src/gpu/effects/GrSimpleTextureEffect.h
diff --git a/src/gpu/effects/GrSimpleTextureEffect.h b/src/gpu/effects/GrSimpleTextureEffect.h
index 565b1eadac4de5135dc8dfa05087d7b0de79b2b9..4c79aab346171e765707ee9bbcbfb2340f4231a0 100644
--- a/src/gpu/effects/GrSimpleTextureEffect.h
+++ b/src/gpu/effects/GrSimpleTextureEffect.h
@@ -68,10 +68,7 @@ private:
         : GrSingleTextureEffect(texture, matrix, params, coordSet) {
     }
 
-    virtual bool onIsEqual(const GrFragmentProcessor& other) const SK_OVERRIDE {
-        const GrSimpleTextureEffect& ste = other.cast<GrSimpleTextureEffect>();
-        return this->hasSameTextureParamsMatrixAndSourceCoords(ste);
-    }
+    virtual bool onIsEqual(const GrFragmentProcessor& other) const SK_OVERRIDE { return true; }
 
     virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE;