Compute if a layer is drawn without LayerTree hierarchy

cc/trees/property_tree_builder.cc

Index: cc/trees/property_tree_builder.cc
diff --git a/cc/trees/property_tree_builder.cc b/cc/trees/property_tree_builder.cc
index 85bdbececf615f892b1b4e1b89399b9a530ab733..5cedeaec17d229bea8ec3fe7a8e3271bf99e1a79 100644
--- a/cc/trees/property_tree_builder.cc
+++ b/cc/trees/property_tree_builder.cc
@@ -48,6 +48,7 @@ struct DataForRecursion {
   bool should_flatten;
   bool target_is_clipped;
   bool is_hidden;
+  bool contributes_to_copy_request;
   const gfx::Transform* device_transform;
   gfx::Vector2dF scroll_compensation_adjustment;
   gfx::Transform compound_transform_since_render_target;
@@ -574,6 +575,14 @@ bool AddEffectNodeIfNeeded(
   node.data.opacity = layer->opacity();
   node.data.screen_space_opacity = layer->opacity();
   node.data.has_render_surface = should_create_render_surface;
+  // A node contributes to copy request when it is in the subtree of a layer
+  // with a copy request and is visible inside the copy request.
+  data_for_children->contributes_to_copy_request =
+      layer->HasCopyRequest() ||
+      (data_from_ancestor.contributes_to_copy_request &&
+       layer->opacity() != 0.f);
+  node.data.contributes_to_copy_request =

[ajuma, 2016/01/15 15:02:47]

Does this value need to get updated on the compositor side after copy requests
are serviced?

[jaydasika, 2016/01/19 20:02:49]

Done.

+      data_for_children->contributes_to_copy_request;
 
   if (!is_root) {
     // The effect node's transform id is used only when we create a render
@@ -637,10 +646,6 @@ void BuildPropertyTreesInternal(
   AddClipNodeIfNeeded(data_from_parent, layer, created_render_surface,
                       created_transform_node, &data_for_children);
 
-  data_for_children.is_hidden =
-      layer->hide_layer_and_subtree() || data_from_parent.is_hidden;
-  layer->set_is_hidden_from_property_trees(data_for_children.is_hidden);
-
   for (size_t i = 0; i < layer->children().size(); ++i) {
     if (!layer->child_at(i)->scroll_parent()) {
       DataForRecursionFromChild<LayerType> data_from_child;
@@ -732,6 +737,7 @@ void BuildPropertyTreesTopLevelInternal(
   data_for_recursion.should_flatten = false;
   data_for_recursion.target_is_clipped = false;
   data_for_recursion.is_hidden = false;
+  data_for_recursion.contributes_to_copy_request = false;
   data_for_recursion.device_transform = &device_transform;
 
   data_for_recursion.transform_tree->clear();