Compute if a layer is drawn without LayerTree hierarchy

cc/trees/property_tree.h

Index: cc/trees/property_tree.h
diff --git a/cc/trees/property_tree.h b/cc/trees/property_tree.h
index 654b5e481f1f0b8780c98ee7552cb33c680abe95..e4dcaadfe82195fff6db7314c2eb9a189db09cf2 100644
--- a/cc/trees/property_tree.h
+++ b/cc/trees/property_tree.h
@@ -242,6 +242,10 @@ struct CC_EXPORT EffectNodeData {
   float screen_space_opacity;
 
   bool has_render_surface;
+  bool has_copy_request;
+  bool has_background_filters;
+  bool is_drawn;
+  bool screen_space_opacity_is_animating;
   int num_copy_requests_in_subtree;
   int transform_id;
   int clip_id;
@@ -479,11 +483,14 @@ class CC_EXPORT EffectTree final : public PropertyTree<EffectNode> {
 
   void ClearCopyRequests();
 
+  bool ContributesToDrawnSurface(int id);
+
   void ToProtobuf(proto::PropertyTree* proto) const;
   void FromProtobuf(const proto::PropertyTree& proto);
 
  private:
   void UpdateOpacities(EffectNode* node, EffectNode* parent_node);
+  void UpdateIsDrawn(EffectNode* node, EffectNode* parent_node);
 };
 
 class CC_EXPORT PropertyTrees final {