mus-ws: Plumb FrameSinkId to Children

chrome/browser/ui/views/frame/browser_frame_mus.cc

Index: chrome/browser/ui/views/frame/browser_frame_mus.cc
diff --git a/chrome/browser/ui/views/frame/browser_frame_mus.cc b/chrome/browser/ui/views/frame/browser_frame_mus.cc
index 78595909c09161223da639181082caeaf952de32..44dbe827da313dc7d91d72d1cead30575d8e5c0e 100644
--- a/chrome/browser/ui/views/frame/browser_frame_mus.cc
+++ b/chrome/browser/ui/views/frame/browser_frame_mus.cc
@@ -48,8 +48,8 @@ views::Widget::InitParams BrowserFrameMus::GetWidgetParams() {
           static_cast<int32_t>(ash::mojom::WindowStyle::BROWSER));
 #endif
   std::unique_ptr<views::DesktopWindowTreeHostMus> desktop_window_tree_host =
-      base::MakeUnique<views::DesktopWindowTreeHostMus>(browser_frame_, this,
-                                                        &properties);
+      base::MakeUnique<views::DesktopWindowTreeHostMus>(
+          browser_frame_, this, cc::FrameSinkId(), &properties);
   // BrowserNonClientFrameViewMus::OnBoundsChanged() takes care of updating
   // the insets.
   desktop_window_tree_host->set_auto_update_client_area(false);