Bug 270146 [Mac] NSToolbar leak in CocoaUIEnhancer
bundles/org.eclipse.ui.cocoa/src/org/eclipse/ui/internal/cocoa/CocoaUIEnhancer.java
* 
	 * @since 3.2
	 */
    protected void hookWorkbenchListener() {
		PlatformUI.getWorkbench().addWindowListener(new IWindowListener() {
			public void windowActivated(IWorkbenchWindow window) {
				
			}
			public void windowDeactivated(IWorkbenchWindow window) {
				
			}
			public void windowClosed(IWorkbenchWindow window) {
				
			}
			public void windowOpened(IWorkbenchWindow window) {
				modifyWindowShell(window);
			}});
	}
    /**
	 * Modify the given workbench window shell bits to show the tool bar toggle
	 * button.
	 * 
	 * @param window
	 *            the window to modify
	 * @since 3.2
	 */
	protected void modifyWindowShell(IWorkbenchWindow window) {