Submit button on not working.

chrome/browser/resources/chromeos/quick_unlock/pin_keyboard.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
  * 'pin-keyboard' is a keyboard that can be used to enter PINs or more generally
  * numeric values.
  *
  * Properties:
@@ skipping 38 matching lines @@
   },
 
   /**
    * Gets the container holding the password field.
    * @type {!HTMLInputElement}
    */
   get inputElement() {
     return this.$$('#pin-input');
   },
 
-  /**
-   * Gets the submit button.
-   * @type {!HTMLElement}
-   */
-  get submitButton() {
-    return this.$$('.submit-button');
-  },
-
   /** Transfers focus to the input element. */
   focus: function() {
     this.$$('#pin-input').focus();
   },
 
   /**
    * Called when a keypad number has been tapped.
    * @param {!{target: !PaperButtonElement}} event
    * @private
    */
@@ skipping 85 matching lines @@
     // does not contain decimals.
     // This heuristic will fail for inputs like '1.0'.
     //
     // Since we still support users entering their passwords through the PIN
     // keyboard, we swap the input box to rtl when we think it is a password
     // (just numbers), if the document direction is rtl.
     var enableRtl = (document.dir == 'rtl') && !Number.isInteger(+password);
     return enableRtl ? 'input-non-pin' : '';
   }
 });