Add a preference to clear plugin data on browser shutdown.

chrome/chrome_browser.gypi

 # Copyright (c) 2010 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': '<(library)',
       'msvs_guid': '5BF908A7-68FB-4A4B-99E3-8C749F1FE4EA',
@@ skipping 1893 matching lines @@
         'browser/password_manager_delegate_impl.cc',
         'browser/password_manager_delegate_impl.h',
         'browser/platform_util.h',
         'browser/platform_util_linux.cc',
         'browser/platform_util_chromeos.cc',
         'browser/platform_util_common_linux.cc',
         'browser/platform_util_mac.mm',
         'browser/platform_util_win.cc',
         'browser/plugin_data_remover.cc',
         'browser/plugin_data_remover.h',
+        'browser/plugin_data_remover_helper.cc',
+        'browser/plugin_data_remover_helper.h',
         'browser/plugin_download_helper.cc',
         'browser/plugin_download_helper.h',
         'browser/plugin_exceptions_table_model.cc',
         'browser/plugin_exceptions_table_model.h',
         'browser/plugin_installer.cc',
         'browser/plugin_installer.h',
         'browser/plugin_process_host.cc',
         'browser/plugin_process_host.h',
         'browser/plugin_process_host_mac.cc',
         'browser/plugin_service.cc',
@@ skipping 2449 matching lines @@
       ],
     },
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: