Adds the listener to the collection of listeners who will be
notified when the window hosting the receiver should be closed.
<p>
This notification occurs when a javascript command such as
<code>window.close</code> gets executed by a <code>Browser</code>.
</p>
@param listener the listener which should be notified
@exception IllegalArgumentException <ul>
<li>ERROR_NULL_ARGUMENT - if the listener is null</li>
</ul>
@exception SWTException <ul>
<li>ERROR_THREAD_INVALID_ACCESS when called from the wrong thread</li>
<li>ERROR_WIDGET_DISPOSED when the widget has been disposed</li>
</ul>
Adds the listener to the collection of listeners who will be notified when the window hosting the receiver should be closed. <p> This notification occurs when a javascript command such as <code>window.close</code> gets executed by a <code>Browser</code>. </p>
@param listener the listener which should be notified
@exception IllegalArgumentException <ul> <li>ERROR_NULL_ARGUMENT - if the listener is null</li> </ul>
@exception SWTException <ul> <li>ERROR_THREAD_INVALID_ACCESS when called from the wrong thread</li> <li>ERROR_WIDGET_DISPOSED when the widget has been disposed</li> </ul>
@since 3.0