I made a feature request to CefSharp but I have been redericted here because it need to be implemented at CEF level (https://github.com/cefsharp/CefSharp/issues/1834).
In our application, we need more control on how a drop down menu is displayed.
We are developping a touch application so we need to customise the drop list visual to make more touch friendly. Like what is done on Mobile OS where it is displayed using native UI element.
Like the DialogHandler and MenuHandler, we need an handler to provide our own implementation of the drop down list.