Remove dependency on language detection library.

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 2609 matching lines @@
             # Sync setup uses native ui.
             'browser/ui/webui/sync_setup_handler_unittest.cc',
 
             # about:flags is unsupported.
             'browser/about_flags_unittest.cc',
 
             # There's no Browser/BrowserList on Android.
             'browser/browser_commands_unittest.cc',
             'browser/extensions/extension_context_menu_model_unittest.cc',
             'browser/extensions/extension_ui_unittest.cc',
+            'browser/language_usage_metrics_unittest.cc',
             'browser/managed_mode/managed_mode_unittest.cc',
             'browser/managed_mode/managed_mode_url_filter_unittest.cc',
             'browser/net/gaia/gaia_oauth_fetcher_unittest.cc',
             'browser/page_cycler/page_cycler_unittest.cc',
             'browser/profiles/off_the_record_profile_impl_unittest.cc',
             'browser/sync/profile_sync_service_session_unittest.cc',
             'browser/sync/sync_global_error_unittest.cc',
             'browser/sync/sync_setup_wizard_unittest.cc',
             'browser/tab_contents/render_view_context_menu_unittest.cc',
             'browser/ui/bookmarks/bookmark_context_menu_controller_unittest.cc',
@@ skipping 2323 matching lines @@
             'sync_integration_tests.isolate',
           ],
           'sources': [
             'sync_integration_tests.isolate',
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }