chrome升级后插件全部失效，解决方案

提供一个最新的manifest写作范例：

{
  "name": "Page action by URL",
  "version": "1.0",
  "description": "Shows a page action for urls which have the letter 'g' in them.",
  "background": { "scripts": ["background.js"] },
  "page_action" :
  {
    "default_icon" : "icon-19.png",
    "default_title" : "There's a 'G' in this URL!"
  },
  "permissions" : [
    "tabs"
  ],
  "icons" : {
    "48" : "icon-48.png",
    "128" : "icon-128.png"
  },
  "manifest_version": 2
}