cc : Layers with background filters are drawn only if parent is drawn.

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 386 matching lines @@
 void FindLayersThatNeedUpdates(LayerImpl* layer,
                                const TransformTree& transform_tree,
                                const EffectTree& effect_tree,
                                LayerImplList* update_layer_list,
                                std::vector<LayerImpl*>* visible_layer_list) {
   DCHECK_GE(layer->effect_tree_index(), 0);
   for (auto* layer_impl : *layer->layer_tree_impl()) {
     bool layer_is_drawn =
         effect_tree.Node(layer->effect_tree_index())->data.is_drawn;
 
-    if (layer_impl->parent() &&
+    if (!IsRootLayer(layer_impl) &&
         LayerShouldBeSkipped(layer_impl, layer_is_drawn, transform_tree))
       continue;
 
     if (LayerNeedsUpdate(layer_impl, layer_is_drawn, transform_tree)) {
       visible_layer_list->push_back(layer_impl);
       update_layer_list->push_back(layer_impl);
     }
 
     if (LayerImpl* mask_layer = layer->mask_layer())
       update_layer_list->push_back(mask_layer);
@@ skipping 747 matching lines @@
 void UpdateElasticOverscroll(PropertyTrees* property_trees,
                              const Layer* overscroll_elasticity_layer,
                              const gfx::Vector2dF& elastic_overscroll) {
   UpdateElasticOverscrollInternal(property_trees, overscroll_elasticity_layer,
                                   elastic_overscroll);
 }
 
 }  // namespace draw_property_utils
 
 }  // namespace cc