Rework quick unlock settings to follow new specs.

chrome/browser/resources/settings/people_page/quick_unlock_authenticate.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.
-
-/**
- * @fileoverview
- *
- * 'settings-quick-unlock-authenticate' shows a password input prompt to the
- * user. It validates the password is correct. Once the user has entered their
- * account password, the page navigates to the quick unlock setup methods page.
- *
- * This element provides a wrapper around chrome.quickUnlockPrivate.setModes
- * which has a prebound account password (the |set-modes| property). The account
- * password by itself is not available for other elements to access.
- *
- * Example:
- *
- * <settings-quick-unlock-authenticate
- *     set-modes="[[setModes]]"
- *     profile-name="[[profileName_]]">
- * </settings-quick-unlock-authenticate>
- */
-
-(function() {
-'use strict';
-
-/** @const */ var PASSWORD_ACTIVE_DURATION_MS = 10 * 60 * 1000; // Ten minutes.
-/** @const */ var AUTOSUBMIT_DELAY_MS = 500; // .5 seconds
-
-/**
- * Helper method that checks if |password| is valid.
- * @param {string} password
- * @param {function(boolean):void} onCheck
- */
-function checkAccountPassword_(password, onCheck) {
-  // We check the account password by trying to update the active set of quick
-  // unlock modes without changing any credentials.
-  chrome.quickUnlockPrivate.getActiveModes(function(modes) {
-    var credentials =
-        /** @type {!Array<string>} */ (Array(modes.length).fill(''));
-    chrome.quickUnlockPrivate.setModes(password, modes, credentials, onCheck);
-  });
-}
-
-Polymer({
-  is: 'settings-quick-unlock-authenticate',
-
-  behavior: [settings.RouteObserverBehavior],
-
-  properties: {
-    /**
-     * A wrapper around chrome.quickUnlockPrivate.setModes with the account
-     * password already supplied. If this is null, the authentication screen
-     * needs to be redisplayed. This property will be cleared after
-     * PASSWORD_ACTIVE_DURATION_MS milliseconds.
-     */
-    setModes: {
-      type: Object,
-      notify: true
-    },
-
-    /**
-     * Name of the profile.
-     */
-    profileName: String,
-
-    /**
-     * The actual value of the password field. This is cleared whenever the
-     * authentication screen is not displayed so that the user's password is not
-     * easily available to an attacker. The actual password is stored as an
-     * captured closure variable inside of setModes.
-     * @private
-     */
-    password_: String,
-
-    /**
-     * Helper property which marks password as valid/invalid.
-     * @private
-     */
-    passwordInvalid_: Boolean
-  },
-
-  /** @protected */
-  currentRouteChanged: function() {
-    // Clear local state if this screen is not active so if this screen shows
-    // up again the user will get a fresh UI.
-    if (settings.getCurrentRoute() == settings.Route.QUICK_UNLOCK_AUTHENTICATE)
-      return;
-
-    this.password_ = '';
-    this.passwordInvalid_ = false;
-  },
-
-  /**
-   * Start or restart a timer to check the account password and move past the
-   * authentication screen.
-   * @private
-   */
-  startDelayedPasswordCheck_: function() {
-    clearTimeout(this.delayedPasswordCheckTimeout_);
-    this.delayedPasswordCheckTimeout_ =
-        setTimeout(this.checkPasswordNow_.bind(this), AUTOSUBMIT_DELAY_MS);
-  },
-
-  /**
-   * Run the account password check right now. This will cancel any delayed
-   * check.
-   * @private
-   */
-  checkPasswordNow_: function() {
-    clearTimeout(this.delayedPasswordCheckTimeout_);
-    clearTimeout(this.clearAccountPasswordTimeout_);
-
-    // The user might have started entering a password and then deleted it all.
-    // Do not submit/show an error in this case.
-    if (!this.password_) {
-      this.passwordInvalid_ = false;
-      return;
-    }
-
-    function onPasswordChecked(valid) {
-      // The password might have been cleared during the duration of the
-      // getActiveModes call.
-      this.passwordInvalid_ = !valid && !!this.password_;
-
-      if (valid) {
-        // Create the |this.setModes| closure and automatically clear it after
-        // |PASSWORD_ACTIVE_DURATION_MS|.
-        var password = this.password_;
-        this.password_ = '';
-
-        this.setModes = function(modes, credentials, onComplete) {
-          chrome.quickUnlockPrivate.setModes(
-              password, modes, credentials, onComplete);
-        };
-
-        function clearSetModes() {
-          // Reset the password so that any cached references to this.setModes
-          // will fail.
-          password = '';
-          this.setModes = null;
-        }
-
-        this.clearAccountPasswordTimeout_ = setTimeout(
-            clearSetModes.bind(this), PASSWORD_ACTIVE_DURATION_MS);
-
-        settings.navigateTo(settings.Route.QUICK_UNLOCK_CHOOSE_METHOD);
-      }
-    }
-
-    checkAccountPassword_(this.password_, onPasswordChecked.bind(this));
-  }
-});
-
-})();