md-settings: Added settings for fingerprint unlock.

chrome/browser/resources/settings/people_page/lock_screen.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-lock-screen' allows the user to change how they unlock their
  * device.
  *
  * Example:
@@ skipping 19 matching lines @@
      * entered password. It's defined only when the user has already entered a
      * valid password.
      *
      * @type {Object|undefined}
      * @private
      */
     setModes_: {
       type: Object,
       observer: 'onSetModesChanged_'
     },
+
+    /**
+     * True if fingerprint unlock settings should be displayed on this machine.
+     * @private
+     */
+    fingerprintUnlockEnabled_: {
+      type: Boolean,
+      value: function() {
+        return loadTimeData.getBoolean('fingerprintUnlockEnabled');

[jdufault, 2016/12/02 23:02:12]

This is not defined inside of options so all of the options related browser
tests are failing.

[sammiequon, 2016/12/03 21:40:51]

Done. Yeah i noticed this after the trybots returned negative.

+      },
+      readOnly: true,
+    },
   },
 
   /** selectedUnlockType is defined in LockStateBehavior. */
   observers: ['selectedUnlockTypeChanged_(selectedUnlockType)'],
 
   /** @override */
   attached: function() {
     // currentRouteChanged is not called during the initial navigation. If the
     // user navigates directly to the lockScreen page, we still want to show the
     // password prompt page.
@@ skipping 66 matching lines @@
     if (this.hasPin)
       return this.i18n('lockScreenChangePinButton');
     return this.i18n('lockScreenSetupPinButton');
   },
 
   /** @private */
   onConfigurePin_: function() {
     this.$.setupPin.open();
   },
 });