mus-ws: Plumb FrameSinkId to Children

ui/aura/test/mus/window_tree_client_private.cc

Index: ui/aura/test/mus/window_tree_client_private.cc
diff --git a/ui/aura/test/mus/window_tree_client_private.cc b/ui/aura/test/mus/window_tree_client_private.cc
index 40f77eb0e7c48dc9c0e681ee4149e9bc1bca6cc2..5ab768ac7909513ebe62ca576201336b6a9cad13 100644
--- a/ui/aura/test/mus/window_tree_client_private.cc
+++ b/ui/aura/test/mus/window_tree_client_private.cc
@@ -29,7 +29,8 @@ void WindowTreeClientPrivate::OnEmbed(ui::mojom::WindowTree* window_tree) {
   const int64_t display_id = 1;
   const Id focused_window_id = 0;
   tree_client_impl_->OnEmbedImpl(window_tree, 1, std::move(root_data),
-                                 display_id, focused_window_id, true);
+                                 display_id, focused_window_id, true,
+                                 cc::FrameSinkId(1, 1));
 }
 
 WindowTreeHostMus* WindowTreeClientPrivate::CallWmNewDisplayAdded(
@@ -47,8 +48,8 @@ WindowTreeHostMus* WindowTreeClientPrivate::CallWmNewDisplayAdded(
     const display::Display& display,
     ui::mojom::WindowDataPtr root_data,
     bool parent_drawn) {
-  return tree_client_impl_->WmNewDisplayAddedImpl(display, std::move(root_data),
-                                                  parent_drawn);
+  return tree_client_impl_->WmNewDisplayAddedImpl(
+      display, std::move(root_data), parent_drawn, cc::FrameSinkId(1, 1));
 }
 
 void WindowTreeClientPrivate::CallOnWindowInputEvent(