addAppHandler
Assign an AppHandler to CefApp. The AppHandler can be used to evaluate application arguments, to register your own schemes and to hook into the shutdown sequence. See CefAppHandler for more details.
This method must be called before CefApp is initialized. CefApp will be initialized automatically if you call createClient() the first time.
Parameters
appHandler
An instance of CefAppHandler.
Throws
in case of CefApp is already initialized