Dump all passwords saved in Google Chrome (tested with Chrome 56.0.2906.0 on Arch Linux)

export_chrome_passwords.js

// Modified version of https://github.com/megmage/chrome-export-passwords
//
// This script allows you to dump all of the passwords stored in your Chrome 
// profile. I tested it with Chrome 56.0.2906.0 dev (64-bit) on Arch Linux and 
// it worked quite well.
//
// Usage:
//
//    - Navigate to chrome://settings-frame/passwords
//    - Copy this code into a snippet in Chrome
//      - Hit F12 or Ctrl+Shift+I to open the developer tools
//      - Switch to the "Sources" tab
//      - Switch to the "Snippets" tab in the left pane of the "Sources" tab
//      - Click the "+" button in the top of the left pane to add a new 
//        snippet, giving it a name (dump_passwords.js)
//      - Paste this code into the snippet and hit Ctrl+S to save it
//    - Right click the newly-created snippet in the left pane and select 
//      "Run"
//    - You should see the password list start to unmask your passwords one by 
//      one while scrolling through the list. Once all passwords have been 
//      revealed, the page contents will be replaced with CSV containing all 
//      of your passwords.


// Number of milliseconds to wait between each password being unmasked. If you 
// see errors in your console while running this snippet or your password list 
// appears to be incomplete consider increasing this value a little and 
// running again.
var DELAY = 10;

var out = ""    // will hold the raw password list
  , out2 = ""   // will hold the CSV password list
  , pm = PasswordManager.getInstance()
  , pl = pm.savedPasswordsList_
  , model = pl.dataModel;

/**
 * For each entry in the list, request that the password be unmasked.
 *
 * When all passwords have been revealed, dump all passwords to the console 
 * and to CSV.
 **/
function unmask_password(idx) {
  // for me it was necessary to actually scroll to each entry before the 
  // password could be revealed
  var item = pl.getListItemByIndex(idx);
  if (item !== null) { item.scrollIntoView({behavior: 'instant'}); }

  // reveal the password
  PasswordManager.requestShowPassword(idx);

  // queue up the next password to be revealed
  if (idx < model.length) {
    setTimeout(function (i) {
      return function () { unmask_password(i); }
    }(idx + 1), DELAY);
  } else {
    // or dump the password list if everything is already unmasked
    dump_unmasked_passwords();
  }
}

function dump_unmasked_passwords() {
  out2 += '# Generated by Password Exporter; Export format 1.1; Encrypted: false\n';
  out2 += '"hostname","username","password","formSubmitURL","httpRealm","usernameField","passwordField"';
  for (i = 0; i < model.length; i++) {
    var arr = model.array_[i]
      , url = arr.url
      , loc = document.createElement('a')
      , username = arr.username
      , item = pl.getListItemByIndex(i)
      , pw = item.childNodes[0].childNodes[2].childNodes[0].value;

    loc.href = url
    out += "\n" + loc.hostname + " " + username + " " + pw;
    out2 += '\n"' + loc.hostname + '","' + username + '","' +
            pw.replace(/"/g, '""') + '","' + url + '"," "," "," "';
  }
  console.log(out);
  document.body.innerHTML = '<pre>' + out2 + '</pre>';
}

function dump_passwords() {
  unmask_password(0);
}

dump_passwords();

Related: How can I export chrome passwords?

Getting the following error when I do this:
Uncaught ReferenceError: PasswordManager is not defined
at :33:10
(anonymous) @ VM128:33

Any thoughts?