FindActiveTreeLayerById  397 cc/layers/layer_impl.cc   LayerImpl* active_twin = layer_tree_impl()->FindActiveTreeLayerById(id());
FindActiveTreeLayerById  862 cc/layers/picture_layer_impl.cc       layer_tree_impl()->FindActiveTreeLayerById(id()));
FindActiveTreeLayerById   78 cc/trees/layer_tree_impl.h   LayerImpl* FindActiveTreeLayerById(int id);