Pin keyboard works with virtual keyboard.

ui/login/display_manager.js

 // Copyright 2014 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 Display manager for WebUI OOBE and login.
  */
 
 // TODO(xiyuan): Find a better to share those constants.
 /** @const */ var SCREEN_OOBE_NETWORK = 'connect';
@@ skipping 186 matching lines @@
      */
     allowToggleVersion_: false,
 
     /**
      * Whether keyboard navigation flow is enforced.
      * @type {boolean}
      */
     forceKeyboardFlow_: false,
 
     /**
+     * Whether the virtual keyboard is displayed.
+     * @type {boolean}
+     */
+    virtualKeyboardShown: false,
+
+    /**
      * Type of UI.
      * @type {string}
      */
     displayType_: DISPLAY_TYPE.UNKNOWN,
 
     /**
      * Error message (bubble) was shown. This is checked in tests.
      */
     errorMessageWasShownForTesting_: false,
 
@@ skipping 32 matching lines @@
      * @param {boolean} hidden Whether header is hidden.
      */
     get headerHidden() {
       return $('login-header-bar').hidden;
     },
 
     set headerHidden(hidden) {
       $('login-header-bar').hidden = hidden;
     },
 
+    set pinHidden(hidden) {
+      this.virtualKeyboardShown = hidden;
+      $('pod-row').setPinHidden(hidden);
+    },
+
     /**
      * Sets the current size of the client area (display size).
      * @param {number} width client area width
      * @param {number} height client area height
      */
     setClientAreaSize: function(width, height) {
       var clientArea = $('outer-container');
       var bottom = parseInt(window.getComputedStyle(clientArea).bottom);
       clientArea.style.minHeight = cr.ui.toCssPx(height - bottom);
     },
@@ skipping 777 matching lines @@
    */
   DisplayManager.refocusCurrentPod = function() {
     $('pod-row').refocusCurrentPod();
   };
 
   // Export
   return {
     DisplayManager: DisplayManager
   };
 });