Settings Router Refactor: Clean up Quick Unlock (and a few misc fixes)

chrome/browser/resources/settings/people_page/quick_unlock_routing_behavior.js

-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-/** @enum {string} */
-var QuickUnlockScreen = {
-  AUTHENTICATE: 'quick-unlock-authenticate',
-  CHOOSE_METHOD: 'quick-unlock-choose-method',
-  SETUP_PIN: 'quick-unlock-setup-pin'
-};
-
-/** @polymerBehavior */
-var QuickUnlockRoutingBehavior = {
-  properties: {
-    /** @type {!settings.Route} */
-    currentRoute: {
-      type: Object,
-      notify: true,
-    }
-  },
-
-  /**
-   * Returns true if the given screen is active.
-   * @param {!QuickUnlockScreen} screen
-   * @return {!boolean}
-   */
-  isScreenActive: function(screen) {
-    var subpage = this.currentRoute.subpage;
-    return subpage.length > 0 && subpage[subpage.length - 1] == screen;
-  },
-};