Fix a crash after removing button from site settings popup

chrome/browser/ui/views/page_info/chosen_object_row.cc

Index: chrome/browser/ui/views/page_info/chosen_object_row.cc
diff --git a/chrome/browser/ui/views/page_info/chosen_object_row.cc b/chrome/browser/ui/views/page_info/chosen_object_row.cc
index 2f8af6ec31ca3559fa8d54a43cb400d08917135e..21bd16c1b7e7e807eade4ef9b7506eebd34261e0 100644
--- a/chrome/browser/ui/views/page_info/chosen_object_row.cc
+++ b/chrome/browser/ui/views/page_info/chosen_object_row.cc
@@ -72,9 +72,8 @@ void ChosenObjectRow::ButtonPressed(views::Button* sender,
   const gfx::Image& image = PageInfoUI::GetChosenObjectIcon(*info_, true);
   icon_->SetImage(image.ToImageSkia());
 
-  RemoveChildView(delete_button_);
-  delete delete_button_;
-  delete_button_ = nullptr;
+  DCHECK(delete_button_->visible());
+  delete_button_->SetVisible(false);
 
   for (ChosenObjectRowObserver& observer : observer_list_)
     observer.OnChosenObjectDeleted(*info_);