Sets whether the NewWindowRequested event is handled by host. If this
is FALSE and no NewWindow is set, the WebView opens a popup window
and it returns as opened WindowProxy. If set to TRUE and no
NewWindow is set for window.open, the opened WindowProxy is for an
testing window object and no window loads.
The default value is FALSE.
Sets whether the NewWindowRequested event is handled by host. If this is FALSE and no NewWindow is set, the WebView opens a popup window and it returns as opened WindowProxy. If set to TRUE and no NewWindow is set for window.open, the opened WindowProxy is for an testing window object and no window loads. The default value is FALSE.