WIP: Propagate SurfaceID up window tree hierarchy

services/ui/public/cpp/window_private.h

Index: services/ui/public/cpp/window_private.h
diff --git a/services/ui/public/cpp/window_private.h b/services/ui/public/cpp/window_private.h
index b875b8bc7f925727d61240767537ce6ef24429bf..9f16ba5f1a6f2cceaf937aab66121ca4e48651f6 100644
--- a/services/ui/public/cpp/window_private.h
+++ b/services/ui/public/cpp/window_private.h
@@ -70,6 +70,13 @@ class WindowPrivate {
                       const gfx::Rect& new_bounds) {
     window_->LocalSetBounds(old_bounds, new_bounds);
   }
+  void LocalSetSurfaceId(const gfx::Size& size,
+                         float device_scale_factor,
+                         const cc::SurfaceId& surface_id,
+                         const cc::SurfaceSequence& surface_sequence) {
+    window_->LocalSetSurfaceId(size, device_scale_factor, surface_id,
+                               surface_sequence);
+  }
   void LocalSetClientArea(
       const gfx::Insets& client_area,
       const std::vector<gfx::Rect>& additional_client_areas) {