mus ws: Consistently use mojom::Cursor instead of int32_t.

services/ui/ws/window_tree.cc

Index: services/ui/ws/window_tree.cc
diff --git a/services/ui/ws/window_tree.cc b/services/ui/ws/window_tree.cc
index 870e22b89b9ca02e29943b229f1d9c7f0f4a6ec0..c3bb743f4e77ee831044c71eb581a9d4b17bab4f 100644
--- a/services/ui/ws/window_tree.cc
+++ b/services/ui/ws/window_tree.cc
@@ -699,7 +699,7 @@ void WindowTree::ProcessWindowOpacityChanged(const ServerWindow* window,
 }
 
 void WindowTree::ProcessCursorChanged(const ServerWindow* window,
-                                      int32_t cursor_id,
+                                      mojom::Cursor cursor_id,
                                       bool originated_change) {
   if (originated_change)
     return;
@@ -707,8 +707,7 @@ void WindowTree::ProcessCursorChanged(const ServerWindow* window,
   if (!IsWindowKnown(window, &client_window_id))
     return;
 
-  client()->OnWindowPredefinedCursorChanged(client_window_id.id,
-                                            mojom::Cursor(cursor_id));
+  client()->OnWindowPredefinedCursorChanged(client_window_id.id, cursor_id);
 }
 
 void WindowTree::ProcessFocusChanged(const ServerWindow* old_focused_window,