Mus+Ash: propagate Surface ID to parents

services/ui/public/cpp/window_tree_client.h

Index: services/ui/public/cpp/window_tree_client.h
diff --git a/services/ui/public/cpp/window_tree_client.h b/services/ui/public/cpp/window_tree_client.h
index 64a45990273e29fdc082fbf5c06d9d12374c4d88..7b8037fdd83e0f212c59fedfb7db89aa1e0f91f8 100644
--- a/services/ui/public/cpp/window_tree_client.h
+++ b/services/ui/public/cpp/window_tree_client.h
@@ -133,6 +133,9 @@ class WindowTreeClient : public mojom::WindowTreeClient,
                      mojo::InterfaceRequest<mojom::Surface> surface,
                      mojom::SurfaceClientPtr client);
 
+  void ReturnSurfaceReference(Id window_id,
+                              const cc::SurfaceSequence& sequence);
+
   // Sets the input capture to |window| without notifying the server.
   void LocalSetCapture(Window* window);
   // Sets focus to |window| without notifying the server.
@@ -328,6 +331,11 @@ class WindowTreeClient : public mojom::WindowTreeClient,
   void OnWindowFocused(Id focused_window_id) override;
   void OnWindowPredefinedCursorChanged(Id window_id,
                                        mojom::Cursor cursor) override;
+  void OnWindowSurfaceCreated(Id window_id,
+                              const cc::SurfaceId& surface_id,
+                              const cc::SurfaceSequence& surface_sequence,
+                              const gfx::Size& frame_size,
+                              float device_scale_factor) override;
   void OnDragDropStart(
       mojo::Map<mojo::String, mojo::Array<uint8_t>> mime_data) override;
   void OnDragEnter(Id window_id,