Nesting

mojo/services/public/cpp/view_manager/lib/view_manager_private.cc

Index: mojo/services/public/cpp/view_manager/lib/view_manager_private.cc
diff --git a/mojo/services/public/cpp/view_manager/lib/view_manager_private.cc b/mojo/services/public/cpp/view_manager/lib/view_manager_private.cc
index 0d1457538df07ac287575c1b16fa1eae7fcf8b40..dc41a5b9fe2aaab2906cc8e1998e477e416f6e10 100644
--- a/mojo/services/public/cpp/view_manager/lib/view_manager_private.cc
+++ b/mojo/services/public/cpp/view_manager/lib/view_manager_private.cc
@@ -50,8 +50,7 @@ void ViewManagerPrivate::AddRoot(ViewTreeNode* root) {
   }
   manager_->roots_.push_back(root);
   root->AddObserver(new RootObserver(root));
-  if (!manager_->root_added_callback_.is_null())
-    manager_->root_added_callback_.Run(manager_, root);
+  manager_->delegate_->OnRootAdded(manager_, root);
 }
 
 void ViewManagerPrivate::RemoveRoot(ViewTreeNode* root) {
@@ -59,8 +58,7 @@ void ViewManagerPrivate::RemoveRoot(ViewTreeNode* root) {
       std::find(manager_->roots_.begin(), manager_->roots_.end(), root);
   if (it != manager_->roots_.end()) {
     manager_->roots_.erase(it);
-    if (!manager_->root_removed_callback_.is_null())
-      manager_->root_removed_callback_.Run(manager_, root);
+    manager_->delegate_->OnRootRemoved(manager_, root);
   }
 }