Move default_locale manifest handler out of //chrome

chrome/chrome_common.gypi

 # Copyright (c) 2013 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': {
     # File lists shared with GN build.
     'chrome_common_sources': [
       'common/all_messages.h',
       'common/attrition_experiments.h',
@@ skipping 115 matching lines @@
       'common/worker_thread_ticker.cc',
       'common/worker_thread_ticker.h',
     ],
     'chrome_common_extensions_sources': [
       'common/extensions/api/commands/commands_handler.cc',
       'common/extensions/api/commands/commands_handler.h',
       'common/extensions/api/extension_action/action_info.cc',
       'common/extensions/api/extension_action/action_info.h',
       'common/extensions/api/file_browser_handlers/file_browser_handler.cc',
       'common/extensions/api/file_browser_handlers/file_browser_handler.h',
-      'common/extensions/api/i18n/default_locale_handler.cc',
-      'common/extensions/api/i18n/default_locale_handler.h',
       'common/extensions/api/input_ime/input_components_handler.cc',
       'common/extensions/api/input_ime/input_components_handler.h',
       'common/extensions/api/notifications/notification_style.cc',
       'common/extensions/api/notifications/notification_style.h',
       'common/extensions/api/omnibox/omnibox_handler.cc',
       'common/extensions/api/omnibox/omnibox_handler.h',
       'common/extensions/api/plugins/plugins_handler.cc',
       'common/extensions/api/plugins/plugins_handler.h',
       'common/extensions/api/speech/tts_engine_manifest_handler.cc',
       'common/extensions/api/speech/tts_engine_manifest_handler.h',
@@ skipping 530 matching lines @@
         'common/safe_browsing/csd.proto'
       ],
       'variables': {
         'proto_in_dir': 'common/safe_browsing',
         'proto_out_dir': 'chrome/common/safe_browsing',
       },
       'includes': [ '../build/protoc.gypi' ],
     },
   ],
 }