This will fire the onbeforeunload event
to ask the user for confirmation to close the page. If there isn't an
onbeforeunload event handler or the user confirms to close the page,
the #WebKitWebView::close signal is emitted, otherwise nothing happens.
Tries to close the web_view.
This will fire the onbeforeunload event to ask the user for confirmation to close the page. If there isn't an onbeforeunload event handler or the user confirms to close the page, the #WebKitWebView::close signal is emitted, otherwise nothing happens.