chromeos: converts observed pointer events to DIPs

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 ea6dd8b3f39c42b7ab9ada68409a368d9043624b..0c54d29ea888a15851a22dbb8c8e5af522ee4675 100644
--- a/services/ui/ws/window_tree.h
+++ b/services/ui/ws/window_tree.h
@@ -264,7 +264,8 @@ class WindowTree : public mojom::WindowTree,
   // |target_window| is the target of the event, and may be null or not known
   // to this tree.
   void SendToPointerWatcher(const ui::Event& event,
-                            ServerWindow* target_window);
+                            ServerWindow* target_window,
+                            int64_t display_id);
 
  private:
   friend class test::WindowTreeTestApi;