This issue was originally filed by [email protected]

https://api.dartlang.org/apidocs/channels/stable/#dart-dom-html.Window@id_onChange reads:

var other = window.open('http://www.example.com', 'foo');
// Closes other window, as it is script-closeable.
other.close();
print(other.closed()); // 'true'

First, closed() should be closed, without parenthesis.

Second, this example prints "false" (Chromium 31.0.1650.48)