md settings: Small changes to lock screen.

chrome/browser/resources/settings/people_page/setup_pin_dialog.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-setup-pin-dialog' is the settings page for choosing a PIN.
  *
  * Example:
  *
@@ skipping 271 matching lines @@
     this.setModes.call(
       null,
       [chrome.quickUnlockPrivate.QuickUnlockMode.PIN],
       [this.pinKeyboardValue_],
       onSetModesCompleted.bind(this));
     this.writeUma_(LockScreenProgress.CONFIRM_PIN);
   },
 
   /**
    * @private
-   * @param {string} problemMessage
-   * @return {boolean}
-   */
-  hasProblem_: function(problemMessage) {
-    return !!problemMessage;
-  },
-
-  /**
-   * @private
    * @param {boolean} isConfirmStep
    * @return {string}
    */
   getTitleMessage_: function(isConfirmStep) {
     return this.i18n(isConfirmStep ? 'configurePinConfirmPinTitle' :
                                      'configurePinChoosePinTitle');
   },
 
   /**
    * @private
    * @param {boolean} isConfirmStep
    * @return {string}
    */
   getContinueMessage_: function(isConfirmStep) {
     return this.i18n(isConfirmStep ? 'confirm' : 'configurePinContinueButton');
   },
 });
 
 })();