Vertical scrolling arrows in bookmark bar folder windows when needed....

chrome/chrome_dll.gypi

 # Copyright (c) 2009 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.
 {
   'target_defaults': {
     'variables': {
       'chrome_dll_target': 0,
     },
     'target_conditions': [
       ['chrome_dll_target==1', {
@@ skipping 228 matching lines @@
                 'app/theme/close_bar_h.pdf',
                 'app/theme/close_bar_p.pdf',
                 'app/theme/find_next_Template.pdf',
                 'app/theme/find_prev_Template.pdf',
                 'app/theme/forward_Template.pdf',
                 'app/theme/go_Template.pdf',
                 'app/theme/home_Template.pdf',
                 'app/theme/menu_chrome_rtl_Template.pdf',
                 'app/theme/menu_chrome_Template.pdf',
                 'app/theme/menu_hierarchy_arrow.pdf',
+                'app/theme/menu_overflow_down.pdf',
+                'app/theme/menu_overflow_up.pdf',
                 'app/theme/menu_page_rtl_Template.pdf',
                 'app/theme/menu_page_Template.pdf',
                 'app/theme/nav.pdf',
                 'app/theme/newtab.pdf',
                 'app/theme/newtab_h.pdf',
                 'app/theme/newtab_p.pdf',
                 'app/theme/omnibox_history.pdf',
                 'app/theme/omnibox_http.pdf',
                 'app/theme/omnibox_https_invalid.pdf',
                 'app/theme/omnibox_https_valid.pdf',
@@ skipping 287 matching lines @@
           'configurations': {
             'Common_Base': {
               'msvs_target_platform': 'x64',
             },
           },
         },  # target chrome_dll
       ],
     }],
   ],
 }