bookmarks: "Open in New Tab" menu should open the bookmark in background.

chrome/browser/resources/bookmark_manager/js/main.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.
 
 const BookmarkList = bmm.BookmarkList;
 const BookmarkTree = bmm.BookmarkTree;
 const ListItem = cr.ui.ListItem;
 const TreeItem = cr.ui.TreeItem;
 const LinkKind = cr.LinkKind;
 const Command = cr.ui.Command;
@@ skipping 1442 matching lines @@
  * @param {!Event} e The event object.
  */
 function handleCommand(e) {
   var command = e.command;
   var commandId = command.id;
   switch (commandId) {
     case 'show-in-folder-command':
       showInFolder();
       break;
     case 'open-in-new-tab-command':
-      openBookmarks(LinkKind.FOREGROUND_TAB);
-      break;
     case 'open-in-background-tab-command':
       openBookmarks(LinkKind.BACKGROUND_TAB);
       break;
     case 'open-in-new-window-command':
       openBookmarks(LinkKind.WINDOW);
       break;
     case 'open-incognito-window-command':
       openBookmarks(LinkKind.INCOGNITO);
       break;
     case 'delete-command':
@@ skipping 74 matching lines @@
   document.addEventListener('copy', handle('copy-command'));
   document.addEventListener('cut', handle('cut-command'));
 
   var pasteHandler = handle('paste-command');
   document.addEventListener('paste', function(e) {
     // Paste is a bit special since we need to do an async call to see if we can
     // paste because the paste command might not be up to date.
     updatePasteCommand(pasteHandler);
   });
 })();