[Bug Report] el-tree component does not support Google browser 42.0 Version 2311.152

### Element UI version
2.14.1

### OS/Browsers version
Chrome 42.0.2311.152

### Vue version
2.6.14

### Reproduction Link
https://codepen.io/cathy-wei/pen/YzrQOZE

### Steps to reproduce
下载chrome42.0.2311.152版本后打开页面打不开，用了polyfill,等兼容性预处理之后还是不可以，就这个组件不行

### What is Expected?
tree树形控件正常展示

### What is actually happening?
页面渲染失败，打不开