fix for Text is not displaying in search box after pressing the ctrl+z key in Bookmark Manager if d…

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.
 
 (function() {
 /** @const */ var BookmarkList = bmm.BookmarkList;
 /** @const */ var BookmarkTree = bmm.BookmarkTree;
 /** @const */ var Command = cr.ui.Command;
 /** @const */ var CommandBinding = cr.ui.CommandBinding;
 /** @const */ var LinkKind = cr.LinkKind;
@@ skipping 441 matching lines @@
     case 'export-menu-command':
       // We can always execute the export-menu command.
       e.canExecute = true;
       break;
     case 'sort-command':
       e.canExecute = !list.isSearch() &&
           list.dataModel && list.dataModel.length > 1 &&
           !isUnmodifiable(tree.getBookmarkNodeById(list.parentId));
       break;
     case 'undo-command':
-      // The global undo command has no visible UI, so always enable it, and
+      // If the search box is active, pass the undo command through
+      // (fixes http://crbug.com/278112). Otherwise, because
+      // the global undo command has no visible UI, always enable it, and
       // just make it a no-op if undo is not possible.
-      e.canExecute = true;
+      e.canExecute = e.currentTarget.activeElement !== $('term');
       break;
     default:
       canExecuteForList(e);
       break;
   }
 }
 
 /**
  * Helper function for handling canExecute for the list and the tree.
  * @param {!Event} e Can execute event object.
@@ skipping 902 matching lines @@
 
   cr.ui.FocusOutlineManager.forDocument(document);
   initializeSplitter();
   bmm.addBookmarkModelListeners();
   dnd.init(selectItemsAfterUserAction);
   tree.reload();
 }
 
 initializeBookmarkManager();
 })();