Move default_locale manifest handler out of //chrome

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.
 {
   'variables': {
     'chrome_unit_tests_sources': [
       '../apps/saved_files_service_unittest.cc',
       '../components/autofill/content/renderer/test_password_autofill_agent.cc',
       '../components/autofill/content/renderer/test_password_autofill_agent.h',
       '../components/autofill/content/renderer/test_password_generation_agent.cc',
@@ skipping 1247 matching lines @@
       'browser/web_resource/resource_request_allowed_notifier_unittest.cc',
       'browser/webdata/keyword_table_unittest.cc',
       'common/chrome_paths_unittest.cc',
       'common/chrome_content_client_unittest.cc',
       'common/cloud_print/cloud_print_helpers_unittest.cc',
       'common/crash_keys_unittest.cc',
       'common/extensions/api/commands/commands_manifest_unittest.cc',
       'common/extensions/api/extension_action/browser_action_manifest_unittest.cc',
       'common/extensions/api/extension_action/page_action_manifest_unittest.cc',
       'common/extensions/api/file_browser_handlers/file_browser_handler_manifest_unittest.cc',
-      'common/extensions/api/i18n/default_locale_manifest_unittest.cc',
       'common/extensions/api/storage/storage_schema_manifest_handler_unittest.cc',
       'common/extensions/command_unittest.cc',
       'common/extensions/extension_file_util_unittest.cc',
       'common/extensions/extension_icon_set_unittest.cc',
       'common/extensions/extension_unittest.cc',
       'common/extensions/feature_switch_unittest.cc',
       'common/extensions/features/chrome_channel_feature_filter_unittest.cc',
       'common/extensions/manifest_handlers/automation_unittest.cc',
       'common/extensions/manifest_handlers/content_scripts_manifest_unittest.cc',
       'common/extensions/manifest_handlers/exclude_matches_manifest_unittest.cc',
@@ skipping 1645 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }