解决 Chrome 书签同步，扩展库、主题库访问失败的方法
当然是因为被墙了。解决办法很简单，修改 hosts 文件：
#Chrome bookmark sync, if not works, try 64.233.183.138
64.233.183.139 clients4.google.com
64.233.183.139 docs.google.com
#Chrome extensions
74.125.39.99 chrome.google.com
74.125.39.99 clients2.google.com
#Chrome themes
74.125.153.138 tools.google.com
