Revert of Matrix convolution bounds fix; affectsTransparentBlack fixes.

include/effects/SkLightingImageFilter.h

Index: include/effects/SkLightingImageFilter.h
diff --git a/include/effects/SkLightingImageFilter.h b/include/effects/SkLightingImageFilter.h
index 33cfceccb2461307d0c67fa6d4eb5f196b49c551..fb356c52e43413a019d57ee7514b86713ae4a28d 100644
--- a/include/effects/SkLightingImageFilter.h
+++ b/include/effects/SkLightingImageFilter.h
@@ -49,7 +49,7 @@
     void flatten(SkWriteBuffer&) const override;
     const SkImageFilterLight* light() const { return fLight.get(); }
     SkScalar surfaceScale() const { return fSurfaceScale; }
-    bool canComputeFastBounds() const override { return false; }
+    bool affectsTransparentBlack() const override { return true; }
 
 private:
     typedef SkImageFilter INHERITED;