Compute if a layer is drawn without LayerTree hierarchy

cc/trees/property_tree.cc

Index: cc/trees/property_tree.cc
diff --git a/cc/trees/property_tree.cc b/cc/trees/property_tree.cc
index 1a4b0719fa93e33f6bd13fbd91249d41c6a2261c..ec8b47128a02c66927807a5549430feb14306d82 100644
--- a/cc/trees/property_tree.cc
+++ b/cc/trees/property_tree.cc
@@ -413,6 +413,7 @@ EffectNodeData::EffectNodeData()
     : opacity(1.f),
       screen_space_opacity(1.f),
       has_render_surface(false),
+      contributes_to_copy_request(false),
       num_copy_requests_in_subtree(0),
       transform_id(0),
       clip_id(0) {}
@@ -421,6 +422,7 @@ bool EffectNodeData::operator==(const EffectNodeData& other) const {
   return opacity == other.opacity &&
          screen_space_opacity == other.screen_space_opacity &&
          has_render_surface == other.has_render_surface &&
+         contributes_to_copy_request == other.contributes_to_copy_request &&
          num_copy_requests_in_subtree == other.num_copy_requests_in_subtree &&
          transform_id == other.transform_id && clip_id == other.clip_id;
 }
@@ -431,6 +433,7 @@ void EffectNodeData::ToProtobuf(proto::TreeNode* proto) const {
   data->set_opacity(opacity);
   data->set_screen_space_opacity(screen_space_opacity);
   data->set_has_render_surface(has_render_surface);
+  data->set_contributes_to_copy_request(contributes_to_copy_request);
   data->set_num_copy_requests_in_subtree(num_copy_requests_in_subtree);
   data->set_transform_id(transform_id);
   data->set_clip_id(clip_id);
@@ -443,6 +446,7 @@ void EffectNodeData::FromProtobuf(const proto::TreeNode& proto) {
   opacity = data.opacity();
   screen_space_opacity = data.screen_space_opacity();
   has_render_surface = data.has_render_surface();
+  contributes_to_copy_request = data.contributes_to_copy_request();
   num_copy_requests_in_subtree = data.num_copy_requests_in_subtree();
   transform_id = data.transform_id();
   clip_id = data.clip_id();