Bug 139986 [CommonNavigator] Convert catch(Error/Throwable) to SafeRunner
In several places the CN framework uses catch(Error/Throwable) to ensure that code does not bring the framework down. Change these to use SafeRunner.
tests/org.eclipse.ui.tests.navigator/src/org/eclipse/ui/tests/navigator/NavigatorTestBase.java
EditorTestHelper.showView(_navigatorInstanceId, false);
	}
	protected void clearAll() throws Exception {
		IProject[] projects = ResourcesPlugin.getWorkspace().getRoot().getProjects();
		for (int i = 0; i < projects.length; i++) {
			FileUtil.delete(projects[i]);
		}
	}
	/**
	 * Use this to not have to wait for the label provider to refresh after changing
	 * the activation.  Otherwise we would have to have a small delay in each test
	 * case which we don't want.
	 */
	protected void refreshViewer() {
		try {
			
			
			
			
			TreeItem[] rootItems = _viewer.getTree().getItems();
			for (int i = 0; i < rootItems.length; i++)
				rootItems[i].setText("");
		} catch (Exception ex) {
			
		}
		_viewer.refresh();
	}
	protected Object verifyMenu(IStructuredSelection sel, String item) {
		MenuManager mm = new MenuManager();