Bug 29163 SafeRunnable needs to be accessible in JFace
We need to be able to access the SafeRunnable in JFace in order that some error protection can be added to preferences and properties dialogs.
bundles/org.eclipse.ui.workbench/extensions/org/eclipse/jface/wizard/WizardDialog.java
if (pageControl == null)
		
		return new Point(0,0);
		
	Point contentSize = pageControl.computeSize(SWT.DEFAULT, SWT.DEFAULT, true);
	Rectangle rect = pageContainerLayout.getClientArea(pageContainer);
	Point containerSize = new Point(rect.width, rect.height);
	return new Point(
		Math.max(0, contentSize.x - containerSize.x),
		Math.max(0, contentSize.y - containerSize.y));
}
/* (non-Javadoc)
 * Method declared on Dialog.
 */
protected void cancelPressed() {
	if (activeRunningOperations <= 0) {
		
		
		
		
		setReturnCode(CANCEL);
		close();
	} else {
		cancelButton.setEnabled(false);
	}
}
/* (non-Javadoc)
 * Method declared on Dialog.
 */
public boolean close() {