Helper classes to scope undo action.

chrome/chrome_browser.gypi

 # Copyright 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 2249 matching lines @@
         'browser/translate/translate_script.cc',
         'browser/translate/translate_script.h',
         'browser/translate/translate_tab_helper.cc',
         'browser/translate/translate_tab_helper.h',
         'browser/translate/translate_url_fetcher.cc',
         'browser/translate/translate_url_fetcher.h',
         'browser/translate/translate_url_util.cc',
         'browser/translate/translate_url_util.h',
         'browser/undo/undo_manager.cc',
         'browser/undo/undo_manager.h',
+        'browser/undo/undo_manager_utils.cc',
+        'browser/undo/undo_manager_utils.h',
         'browser/undo/undo_operation.h',
         'browser/upgrade_detector.cc',
         'browser/upgrade_detector.h',
         'browser/upgrade_detector_impl.cc',
         'browser/upgrade_detector_impl.h',
         'browser/upload_list.cc',
         'browser/upload_list.h',
         'browser/usb/usb_device_handle.cc',
         'browser/usb/usb_device_handle.h',
         'browser/usb/usb_interface.cc',
@@ skipping 1072 matching lines @@
             'package_name': 'org/chromium/chrome/browser/ui/toolbar',
             'template_deps': ['browser/ui/toolbar/toolbar_model_security_level_list.h'],
           },
           'includes': [ '../build/android/java_cpp_template.gypi' ],
         },
       ],
      },
     ],
   ],
 }