Fix scrolling of network menus.

chrome/browser/resources/options2/chromeos/network_list.js

 // Copyright (c) 2012 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.
 
 cr.define('options.network', function() {
 
   var ArrayDataModel = cr.ui.ArrayDataModel;
   var List = cr.ui.List;
   var ListItem = cr.ui.ListItem;
   var Menu = cr.ui.Menu;
@@ skipping 274 matching lines @@
         Menu.decorate(menu);
         for (var i = 0; i < this.data.menu.length; i++) {
           var entry = this.data.menu[i];
           var button = this.ownerDocument.createElement('div');
           button.className = 'network-menu-item';
           var buttonLabel = this.ownerDocument.createElement('div');
           buttonLabel.className = 'network-menu-item-label';
           buttonLabel.textContent = entry.label;
           button.appendChild(buttonLabel);
           button.addEventListener('click', entry.command);
-          button.addEventListener('mousedown', function(e) {
-            // Prevent blurring of list, which would close the menu.
-            e.preventDefault();
-          });
           MenuItem.decorate(button);
           menu.appendChild(button);
         }
         return menu;
       }
       return null;
     },
 
     /**
      * Displays a popup menu.
      */
     showMenu: function() {
       var rebuild = false;
       if (!this.menu_) {
         rebuild = true;
         var existing = $(this.getMenuName_());
         if (existing)
           closeMenu_();
         this.menu_ = this.createMenu();
+        this.menu_.addEventListener('mousedown', function(e) {
+          // Prevent blurring of list, which would close the menu.
+          e.preventDefault();
+        }, true);
         var parent = $('network-menus');
         if (existing)
           parent.replaceChild(this.menu_, existing);
         else
           parent.appendChild(this.menu_);
       }
       var top = this.offsetTop + this.clientHeight;
       var menuId = this.getMenuName_();
       if (menuId != activeMenu_ || rebuild) {
         closeMenu_();
@@ skipping 235 matching lines @@
           chrome.send('buttonClickCallback',
                       [type, path, command]);
           closeMenu_();
         };
       } else if (command != null) {
         callback = function() {
           command(data);
           closeMenu_();
         };
       }
-      if (callback != null) {
+      if (callback != null)
         button.addEventListener('click', callback);
-        button.addEventListener('mousedown', function(e) {
-          // Prevent blurring of list, which would close the menu.
-          e.preventDefault();
-        });
-      } else {
+      else
         buttonLabel.classList.add('network-disabled-control');
-      }
       MenuItem.decorate(button);
       menu.appendChild(button);
       return button;
     },
 
     /**
      * Adds a menu item for connecting to a network.
      * @param {!Element} menu Parent menu.
      * @param {Object} data Description of the network.
      * @param {string=} opt_connect Optional connection method.
@@ skipping 408 matching lines @@
    * Whether the Network list is disabled. Only used for display purpose.
    * @type {boolean}
    */
   cr.defineProperty(NetworkList, 'disabled', cr.PropertyKind.BOOL_ATTR);
 
   // Export
   return {
     NetworkList: NetworkList
   };
 });