Compute if a layer is drawn without LayerTree hierarchy

cc/trees/draw_property_utils.cc

Index: cc/trees/draw_property_utils.cc
diff --git a/cc/trees/draw_property_utils.cc b/cc/trees/draw_property_utils.cc
index 07270db1dbd5ab4cdb9e62d17464c0f9a9ee8341..1f846325da444ae84152b5608915d41890cfeb78 100644
--- a/cc/trees/draw_property_utils.cc
+++ b/cc/trees/draw_property_utils.cc
@@ -430,18 +430,19 @@ static bool LayerShouldBeSkipped(LayerType* layer,
 template <typename LayerType>
 void FindLayersThatNeedUpdates(
     LayerType* layer,
-    const TransformTree& tree,
-    bool subtree_is_visible_from_ancestor,
+    const TransformTree& transform_tree,
+    const EffectTree& effect_tree,
     typename LayerType::LayerListType* update_layer_list,
     std::vector<LayerType*>* visible_layer_list) {
+  DCHECK_GE(layer->effect_tree_index(), 0);
   bool layer_is_drawn =
-      layer->HasCopyRequest() ||
-      (subtree_is_visible_from_ancestor && !layer->hide_layer_and_subtree());
+      effect_tree.Node(layer->effect_tree_index())->data.is_drawn;
 
-  if (layer->parent() && SubtreeShouldBeSkipped(layer, layer_is_drawn, tree))
+  if (layer->parent() &&
+      SubtreeShouldBeSkipped(layer, layer_is_drawn, transform_tree))
     return;
 
-  if (!LayerShouldBeSkipped(layer, layer_is_drawn, tree)) {
+  if (!LayerShouldBeSkipped(layer, layer_is_drawn, transform_tree)) {
     visible_layer_list->push_back(layer);
     update_layer_list->push_back(layer);
   }
@@ -457,7 +458,7 @@ void FindLayersThatNeedUpdates(
   }
 
   for (size_t i = 0; i < layer->children().size(); ++i) {
-    FindLayersThatNeedUpdates(layer->child_at(i), tree, layer_is_drawn,
+    FindLayersThatNeedUpdates(layer->child_at(i), transform_tree, effect_tree,
                               update_layer_list, visible_layer_list);
   }
 }
@@ -679,9 +680,8 @@ static void ComputeVisibleRectsUsingPropertyTreesInternal(
                can_render_to_separate_surface);
   ComputeEffects(&property_trees->effect_tree);
 
-  const bool subtree_is_visible_from_ancestor = true;
   FindLayersThatNeedUpdates(root_layer, property_trees->transform_tree,
-                            subtree_is_visible_from_ancestor, update_layer_list,
+                            property_trees->effect_tree, update_layer_list,
                             visible_layer_list);
   CalculateVisibleRects<LayerType>(
       *visible_layer_list, property_trees->clip_tree,