Adding a BrowsingDataHelper class to hold some useful methods.

chrome/chrome_tests.gypi

 # 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.
 {
   'variables' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
       'common/pref_names.cc',
@@ skipping 1282 matching lines @@
         'browser/bookmarks/bookmark_model_unittest.cc',
         'browser/bookmarks/bookmark_node_data_unittest.cc',
         'browser/bookmarks/bookmark_utils_unittest.cc',
         'browser/bookmarks/recently_used_folders_combo_model_unittest.cc',
         'browser/browser_about_handler_unittest.cc',
         'browser/browser_commands_unittest.cc',
         'browser/browsing_data_appcache_helper_unittest.cc',
         'browser/browsing_data_cookie_helper_unittest.cc',
         'browser/browsing_data_database_helper_unittest.cc',
         'browser/browsing_data_file_system_helper_unittest.cc',
+        'browser/browsing_data_helper_unittest.cc',
         'browser/browsing_data_indexed_db_helper_unittest.cc',
         'browser/browsing_data_local_storage_helper_unittest.cc',
         'browser/browsing_data_quota_helper_unittest.cc',
         'browser/browsing_data_remover_unittest.cc',
         'browser/chrome_browser_application_mac_unittest.mm',
         'browser/chrome_browser_main_unittest.cc',
         'browser/chrome_page_zoom_unittest.cc',
         'browser/chromeos/cros/network_constants.h',
         'browser/chromeos/cros/network_library.cc',
         'browser/chromeos/cros/network_library.h',
@@ skipping 3358 matching lines @@
               # Use outputs of this action as inputs for the main target build.
               # Seems as a misnomer but makes this happy on Linux (scons).
               'process_outputs_as_sources': 1,
             },
           ],  # 'actions'
         },
       ]
     }],  # 'coverage!=0'
   ],  # 'conditions'
 }