ChromeOS: update alignment of user POD error bubble.

ui/login/login_ui_tools.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 JS helpers used on login.
  */
 
 cr.define('cr.ui.LoginUITools', function() {
   return {
     /**
      * Computes max-height for an element so that it doesn't overlap shelf.
      * @param {element} DOM element
      * @param {wholeWindow} Whether the element can go outside outer-container.
      */
     getMaxHeightBeforeShelfOverlapping : function(element, wholeWindow) {
       var maxAllowedHeight =
           $('outer-container').offsetHeight -
           element.getBoundingClientRect().top -
           parseInt(window.getComputedStyle(element).marginTop) -
           parseInt(window.getComputedStyle(element).marginBottom);
-      if (wholeWindow)
+      if (wholeWindow) {
         maxAllowedHeight +=
            parseInt(window.getComputedStyle($('outer-container')).bottom);
+      }
       return maxAllowedHeight;
-    }
+    },
+
+    /**
+     * Computes max-width for an element so that it does fit the
+     * outer-container.
+     * @param {element} DOM element
+     */
+    getMaxWidthToFit : function(element) {
+      var maxAllowedWidth =
+          $('outer-container').offsetWidth -
+          element.getBoundingClientRect().left -
+          parseInt(window.getComputedStyle(element).marginLeft) -
+          parseInt(window.getComputedStyle(element).marginRight);
+      return maxAllowedWidth;
+    },
   }
 });