Function cef_media_router_get_global 

pub unsafe extern "C" fn cef_media_router_get_global(
    callback: *mut _cef_completion_callback_t,
) -> *mut cef_media_router_t

Returns the MediaRouter object associated with the global request context. If |callback| is non-NULL it will be executed asnychronously on the UI thread after the manager’s storage has been initialized. Equivalent to calling cef_request_context_t::cef_request_context_get_global_context()->get _media_router().