Bug 157805 [Workbench] Add Hide Toolbars to the Window menu
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/WorkbenchActionBuilder.java
menu.add(cleanAction);
        menu.add(toggleAutoBuildAction);
        menu.add(new GroupMarker(IWorkbenchActionConstants.BUILD_EXT));
        menu.add(new Separator());
        menu.add(new GroupMarker(IWorkbenchActionConstants.MB_ADDITIONS));
        menu.add(new GroupMarker(IWorkbenchActionConstants.PROJ_END));
        menu.add(new Separator());
        menu.add(projectPropertyDialogAction);
        return menu;
    }
    /**
     * Creates and returns the Window menu.
     */
    private MenuManager createWindowMenu() {
        MenuManager menu = new MenuManager(
                IDEWorkbenchMessages.Workbench_window, IWorkbenchActionConstants.M_WINDOW);
        menu.add(newWindowAction);
		menu.add(newEditorAction);
		
		ActionContributionItem toggleCoolbarItem = new ActionContributionItem(toggleCoolbarAction);
		toggleCoolbarItem.setVisible(!"carbon".equals(SWT.getPlatform())); 
		menu.add(toggleCoolbarItem);
        menu.add(new Separator());
        addPerspectiveActions(menu);
        menu.add(new Separator());
        addKeyboardShortcuts(menu);
        menu.add(new Separator(IWorkbenchActionConstants.MB_ADDITIONS));
        
        
        ActionContributionItem openPreferencesItem = new ActionContributionItem(openPreferencesAction);