Chrome extension that overrides navigator.geolocation with Mocklocation in all pages

manifest.json

{
  "manifest_version": 2,
  "name": "Mocklocation",
  "description": "Override navigator.geolocation with Mocklocation",
  "version": "0.1",
  "permissions": [
    "http://*/*",
    "https://*/*"
  ],

  "content_scripts": [
    {
        "matches": ["http://*/*"],
        "js": ["trigger.js"]
    },
    {
        "matches": ["https://*/*"],
        "js": ["trigger.js"]
    }
  ]

}

trigger.js

(function(html) {
    html.setAttribute('class', html.getAttribute('class') + ' mock-geolocation');
    var head = html.querySelector('head');

    var scripts = [
        '//dl.dropboxusercontent.com/u/577031/mocklocation/mocklocation.js',
        '//cdn.leafletjs.com/leaflet-0.7.2/leaflet.js'
    ];

    var styles = [
        '//dl.dropboxusercontent.com/u/577031/mocklocation/mocklocation.css',
        '//cdn.leafletjs.com/leaflet-0.7.2/leaflet.css'
    ];


    scripts.forEach(function(url) {
        var script = document.createElement('script');
        script.setAttribute('src', url);
        head.insertBefore(script, head.firstChild);
    });

    styles.forEach(function(url) {
        var style = document.createElement('link');
        style.setAttribute('rel', 'stylesheet');
        style.setAttribute('href', url);
        head.insertBefore(style, head.firstChild);
    });
}(document.querySelector('html')));