Chrome拡張でjQueryをつかいたい

"content_scripts": のmatchesとjsは必須。書いてないBlogも見かけるが、書かないとダメ。
おそらくjquery.xdomainajax.jsはjQuery指定のあとに書くっぽい。

{
    "manifest_version": 2,
    "content_security_policy": "script-src 'self'; object-src 'self'",
    "name": "Git Hub API" ,
    "description": "Git Hub API",
    "version": "0.1",
    "background": {
        "scripts": ["background.js"]
    },
    "permissions": [
        "tabs",
        "http://*/*",
        "https://*/*"
    ],
    "content_scripts": [
    {
      "matches": [ "http://*/*" ],
      "js": [ "jquery-1.9.0.min.js", "jquery.xdomainajax.js", "content.js" ]
    }
    ],
    "browser_action": {
        "default_icon": "icon19.png",
        "default_title": "Github API",
        "default_popup": "popup.html"
    },
    "web_accessible_resources": [
        "image/chromix_error_icon.png",
        "image/chromix_normal_icon.png",
        "image/warning.png",
        "image/secure.ico"
    ]
}