Enable the ManagedBookmarks policy on all platforms.

chrome/chrome_tests_unit.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': [
     {
       # This target contains mocks and test utilities that don't belong in
       # production libraries but are used by more than one test executable.
       'target_name': 'test_support_common',
       'type': 'static_library',
@@ skipping 1143 matching lines @@
         'browser/performance_monitor/database_unittest.cc',
         'browser/plugins/plugin_finder_unittest.cc',
         'browser/plugins/plugin_info_message_filter_unittest.cc',
         'browser/plugins/plugin_installer_unittest.cc',
         'browser/plugins/plugin_metadata_unittest.cc',
         'browser/plugins/plugin_prefs_unittest.cc',
         'browser/policy/cloud/cloud_policy_invalidator_unittest.cc',
         'browser/policy/cloud/user_policy_signin_service_unittest.cc',
         'browser/policy/file_selection_dialogs_policy_handler_unittest.cc',
         'browser/policy/javascript_policy_handler_unittest.cc',
+        'browser/policy/managed_bookmarks_policy_handler_unittest.cc',
         'browser/policy/policy_path_parser_unittest.cc',
         'browser/policy/url_blacklist_manager_unittest.cc',
         'browser/predictors/autocomplete_action_predictor_table_unittest.cc',
         'browser/predictors/autocomplete_action_predictor_unittest.cc',
         'browser/prefs/chrome_pref_service_unittest.cc',
         'browser/prefs/command_line_pref_store_unittest.cc',
         'browser/prefs/incognito_mode_prefs_unittest.cc',
         'browser/prefs/leveldb_pref_store_unittest.cc',
         'browser/prefs/mock_validation_delegate.cc',
         'browser/prefs/mock_validation_delegate.h',
@@ skipping 1665 matching lines @@
             'unit_tests.isolate',
           ],
           'sources': [
             'unit_tests.isolate',
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }