Fixed regression bug regarding pod on public session.

ui/login/account_picker/user_pod_row.js

Index: ui/login/account_picker/user_pod_row.js
diff --git a/ui/login/account_picker/user_pod_row.js b/ui/login/account_picker/user_pod_row.js
index c258be189f92761f2b8efd3a592195be78f04b0a..6121fd7e9f2d9a4bfc77148fd8041454d98c7cae 100644
--- a/ui/login/account_picker/user_pod_row.js
+++ b/ui/login/account_picker/user_pod_row.js
@@ -843,6 +843,14 @@ cr.define('login', function() {
     },
 
     /**
+     * Gets image pane element.
+     * @type {!HTMLDivElement}
+     */
+    get imagePaneElement() {
+      return this.querySelector('.user-image-pane');
+    },
+
+    /**
      * Gets image element.
      * @type {!HTMLImageElement}
      */
@@ -1129,8 +1137,8 @@ cr.define('login', function() {
     },
 
     setPinVisibility: function(visible) {
-      var elements = [this, this.authElement, this.imageElement,
-                      this.signInElement, this.pinContainer];
+      var elements = [this, this.authElement, this.imagePaneElement,
+                      this.imageElement, this.pinContainer];
 
       for (var idx = 0; idx < elements.length; idx++) {
         var currentElement = elements[idx];