Mojo: more idiomatic C++ bindings

mojo/services/view_manager/test_change_tracker.h

Index: mojo/services/view_manager/test_change_tracker.h
diff --git a/mojo/services/view_manager/test_change_tracker.h b/mojo/services/view_manager/test_change_tracker.h
index 066017ac6d18381b797e6c3292b8d94b8aafe649..1629090272dc6f9a6e186e6a88f8901dabc6fa19 100644
--- a/mojo/services/view_manager/test_change_tracker.h
+++ b/mojo/services/view_manager/test_change_tracker.h
@@ -89,16 +89,16 @@ class TestChangeTracker {
   void OnViewManagerConnectionEstablished(
       TransportConnectionId connection_id,
       TransportChangeId next_server_change_id,
-      const Array<INode>& nodes);
+      Array<INodePtr> nodes);
   void OnServerChangeIdAdvanced(TransportChangeId change_id);
   void OnNodeBoundsChanged(TransportNodeId node_id,
-                           const Rect& old_bounds,
-                           const Rect& new_bounds);
+                           RectPtr old_bounds,
+                           RectPtr new_bounds);
   void OnNodeHierarchyChanged(TransportNodeId node_id,
                               TransportNodeId new_parent_id,
                               TransportNodeId old_parent_id,
                               TransportChangeId server_change_id,
-                              const Array<INode>& nodes);
+                              Array<INodePtr> nodes);
   void OnNodeDeleted(TransportNodeId node_id,
                      TransportChangeId server_change_id);
   void OnViewDeleted(TransportViewId view_id);