Bookmark context menu "Add folder..." allows to create folder with empty name(empty string).

chrome/browser/ui/cocoa/bookmarks/bookmark_editor_base_controller.mm

Index: chrome/browser/ui/cocoa/bookmarks/bookmark_editor_base_controller.mm
diff --git a/chrome/browser/ui/cocoa/bookmarks/bookmark_editor_base_controller.mm b/chrome/browser/ui/cocoa/bookmarks/bookmark_editor_base_controller.mm
index e9b1fb915e9c6cee8e0c2f7e1784906da32a9183..405f935ff55f40ab5125c075b5bba91fd5782f2f 100644
--- a/chrome/browser/ui/cocoa/bookmarks/bookmark_editor_base_controller.mm
+++ b/chrome/browser/ui/cocoa/bookmarks/bookmark_editor_base_controller.mm
@@ -582,9 +582,13 @@ NSString* const kOkEnabledName = @"okEnabled";
   for (BookmarkFolderInfo* subFolderInfo in subfolders) {
     if ([subFolderInfo newFolder]) {
       BookmarkModel* model = [self bookmarkModel];
+      NSString* name = [subFolderInfo folderName];
+      if ([name length] == 0)
+      name =
+        l10n_util::GetNSStringWithFixup(IDS_BOOKMARK_EDITOR_NEW_FOLDER_NAME);
       const BookmarkNode* newFolder =
           model->AddFolder(parentNode, i,
-              base::SysNSStringToUTF16([subFolderInfo folderName]));
+              base::SysNSStringToUTF16(name));
       // Update our dictionary with the actual folder node just created.
       [subFolderInfo setFolderNode:newFolder];
       [subFolderInfo setNewFolder:NO];