WIP: Surface Synchronization System

services/ui/ws/window_tree.h

Index: services/ui/ws/window_tree.h
diff --git a/services/ui/ws/window_tree.h b/services/ui/ws/window_tree.h
index 756c15514dab9a9a2ff659daff63596e59b66e2f..8c247ec7b6efe2a8d0b52ba906e1d441f044156c 100644
--- a/services/ui/ws/window_tree.h
+++ b/services/ui/ws/window_tree.h
@@ -190,6 +190,10 @@ class WindowTree : public mojom::WindowTree,
                                             const ServerWindow* window);
   void AddActivationParent(const ClientWindowId& window_id);
 
+  void OnSetWindowBoundsResponse(uint32_t change_id,
+                                 const gfx::Rect& bounds,
+                                 const cc::LocalSurfaceId& local_surface_id);
+
   // Calls through to the client.
   void OnChangeCompleted(uint32_t change_id, bool success);
   // |state_to_ack| is the WindowManagerState to call through to when the ack
@@ -477,6 +481,9 @@ class WindowTree : public mojom::WindowTree,
   void RemoveActivationParent(Id transport_window_id) override;
   void ActivateNextWindow() override;
   void SetExtendedHitArea(Id window_id, const gfx::Insets& hit_area) override;
+  void WmSetBoundsResponse(uint32_t change_id,
+                           const gfx::Rect& bounds,
+                           const cc::LocalSurfaceId& local_surface_id) override;
   void WmResponse(uint32_t change_id, bool response) override;
   void WmRequestClose(Id transport_window_id) override;
   void WmSetFrameDecorationValues(