reload-tree.user.js

// ==UserScript==
// @name           Tree Reloader
// @namespace      tree-reloader
// @description    Reloads the tree
// @match          http://build.chromium.org/*
// @match          https://build.chromium.org/*
// @match          http://chromegw.corp.google.com/*
// @match          https://chromegw.corp.google.com/*
// @match          http://chromium-build.appspot.com/*
// @match          https://chromium-build.appspot.com/*
// @version        0.1
// ==/UserScript==

(function(window) {
  if (/[&?]reload=(\d+)/.test(window.location.search)) {
    window.setTimeout(function() {
      window.location.reload();
    }, window.parseInt(RegExp.$1, 10) * 1000);
  }
}(unsafeWindow));