cc : Simplify layer skipping logic

cc/trees/layer_tree_impl.h

Index: cc/trees/layer_tree_impl.h
diff --git a/cc/trees/layer_tree_impl.h b/cc/trees/layer_tree_impl.h
index 63ac715b5cc7e4ab28522f46f6e6179be6d85795..5e061e5d3e94217241eb6cb3a972edf7c5d4e071 100644
--- a/cc/trees/layer_tree_impl.h
+++ b/cc/trees/layer_tree_impl.h
@@ -142,6 +142,11 @@ class CC_EXPORT LayerTreeImpl {
     property_trees_.is_main_thread = false;
     property_trees_.is_active = IsActiveTree();
     property_trees_.transform_tree.set_source_to_parent_updates_allowed(false);
+    // The value of some effect node properties (like is_drawn) depends on
+    // whether we are on the active tree or not. So, we need to update the
+    // effect tree.
+    if (IsActiveTree())
+      property_trees_.effect_tree.set_needs_update(true);
   }
   PropertyTrees* property_trees() { return &property_trees_; }