Fix CSS reference filters with negative transformed children.

cc/trees/effect_node.cc

Index: cc/trees/effect_node.cc
diff --git a/cc/trees/effect_node.cc b/cc/trees/effect_node.cc
index 52109070d9048e3b0cd11dd2d1a4e66c453e6dad..337d4114d6b366da1e3579c86bb6c015df9f1556 100644
--- a/cc/trees/effect_node.cc
+++ b/cc/trees/effect_node.cc
@@ -48,6 +48,7 @@ bool EffectNode::operator==(const EffectNode& other) const {
          has_copy_request == other.has_copy_request &&
          filters == other.filters &&
          background_filters == other.background_filters &&
+         filters_origin == other.filters_origin &&
          blend_mode == other.blend_mode &&
          surface_contents_scale == other.surface_contents_scale &&
          unscaled_mask_target_size == other.unscaled_mask_target_size &&