use henri's parser from a webworker

servo-worker.js

importScripts('../dom.js');
importScripts('domstr.js');

// Mock up enough fake stuff so that the parser can load
// This can be removed once using the non-GWT compiled parser
window = {
    location: {href: "foo"},
    setTimeout: function() {
        return Function.prototype.apply(setTimeout, arguments);
    },
    clearTimeout: function(arg) {
        return Function.prototype.apply(clearTimeout, arguments);
    }
}
document.location = window.location;
document.write = function() {}

importScripts('parser.js');

var event = document.createEvent('customevent');
event.initEvent('DOMContentLoaded', false, true);
document.dispatchEvent(event);

document.implementation.mozSetOutputMutationHandler(
    document,
    function(evt) {
        postMessage(JSON.stringify(evt));
    }
);

function GET(url) {
    var req = new XMLHttpRequest();
    req.open("GET", url, false); // in a thread, so blocking ok
    req.send('');
    window.parseHtmlDocument(req.responseText, document, 
    function() {
        postMessage(JSON.stringify({done: true}));
    },
    null);
}

onmessage = function(message) {
    var url = message.data.url.toString();
    GET(url);
}