Compute if a layer is drawn without LayerTree hierarchy

cc/trees/draw_property_utils.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/trees/draw_property_utils.h"
 
 #include <stddef.h>
 
 #include <vector>
 
@@ skipping 416 matching lines @@
   return false;
 }
 
 template <typename LayerType>
 void FindLayersThatNeedUpdates(
     LayerType* layer,
     const TransformTree& tree,
     bool subtree_is_visible_from_ancestor,
     typename LayerType::LayerListType* update_layer_list,
     std::vector<LayerType*>* visible_layer_list) {
-  bool layer_is_drawn =
-      layer->HasCopyRequest() ||
-      (subtree_is_visible_from_ancestor && !layer->hide_layer_and_subtree());
+  bool layer_is_drawn = layer->IsDrawnFromPropertyTrees();
 
   if (layer->parent() && SubtreeShouldBeSkipped(layer, layer_is_drawn, tree))
     return;
 
   if (!LayerShouldBeSkipped(layer, layer_is_drawn, tree)) {
     visible_layer_list->push_back(layer);
     update_layer_list->push_back(layer);
   }
 
   // Append mask layers to the update layer list.  They don't have valid visible
@@ skipping 728 matching lines @@
 
 void UpdateElasticOverscrollInPropertyTrees(
     PropertyTrees* property_trees,
     const Layer* overscroll_elasticity_layer,
     const gfx::Vector2dF& elastic_overscroll) {
   UpdateElasticOverscrollInPropertyTreesInternal(
       property_trees, overscroll_elasticity_layer, elastic_overscroll);
 }
 
 }  // namespace cc