[cros,login] Hides dropdown menu on activation.

chrome/browser/resources/chromeos/login/network_dropdown.js

 // Copyright (c) 2011 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 Network drop-down implementation.
  */
 
 cr.define('cr.ui', function() {
   /**
@@ skipping 70 matching lines @@
 
   DropDown.prototype = {
     __proto__: HTMLDivElement.prototype,
 
     /** @inheritDoc */
     decorate: function() {
       this.appendChild(this.createOverlay_());
       this.appendChild(this.title_ = this.createTitle_());
       this.appendChild(new DropDownContainer());
 
-      this.isShown = false;
       this.addEventListener('keydown', this.keyDownHandler_);
 
       this.title_.id = this.id + '-dropdown';
       this.title_.setAttribute('role', 'button');
       this.title_.setAttribute('aria-haspopup', 'true');
     },
 
     /**
      * Returns true if dropdown menu is shown.
      * @type {bool} Whether menu element is shown.
@@ skipping 270 matching lines @@
   /**
    * Activates or deactivates network drop-down. Only one network drop-down
    * can be active at the same time. So activating new drop-down deactivates
    * the previous one. Deactivating not active drop-down does nothing.
    * @param {string} element_id Id of the element which is network drop-down.
    * @param {boolean} is_active Is drop-down active?
    */
   DropDown.setActive = function(elementId, isActive) {
     if (isActive) {
       DropDown.activeElementId_ = elementId;
+      $(elementId).isShown = false;
       chrome.send('networkDropdownShow', [elementId]);
     } else {
       if (DropDown.activeElementId_ == elementId) {
         DropDown.activeElementId_ = '';
         chrome.send('networkDropdownHide', []);
       }
     }
   };
 
   /**
    * Refreshes network drop-down. Should be called on language change.
    */
   DropDown.refresh = function() {
     chrome.send('networkDropdownRefresh', []);
   };
 
   return {
     DropDown: DropDown
   };
 });