Tests that Elements properly populate and select after immediate updates crbug.com/829884
BEFORE: children: null, childNodeCount: 2
AFTER: children: null, childNodeCount: 3
AFTER EXPAND: TreeElement childCount: 3
Selected element:'BODY'
Tests that Elements properly populate and select after immediate updates crbug.com/829884
BEFORE: children: null, childNodeCount: 2
AFTER: children: null, childNodeCount: 3
AFTER EXPAND: TreeElement childCount: 3
Selected element:'BODY'