Function handle_get_inner_or_outer_html 

pub(crate) fn handle_get_inner_or_outer_html(
    cx: &mut JSContext,
    state: &DevtoolsState,
    pipeline_id: PipelineId,
    node_id: &str,
    reply: GenericSender<Option<String>>,
    html_type: GetHTMLType,
)