Fix special character handling in audio preferences.

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 60 matching lines @@
       'browser/chrome_content_browser_client_unittest.cc',
       'browser/chrome_elf_init_unittest_win.cc',
       'browser/chrome_page_zoom_unittest.cc',
       'browser/chrome_process_singleton_win_unittest.cc',
       'browser/chromeos/accessibility/magnification_manager_unittest.cc',
       'browser/chromeos/attestation/attestation_ca_client_unittest.cc',
       'browser/chromeos/attestation/attestation_policy_observer_unittest.cc',
       'browser/chromeos/attestation/fake_certificate.cc',
       'browser/chromeos/attestation/fake_certificate.h',
       'browser/chromeos/attestation/platform_verification_flow_unittest.cc',
+      'browser/chromeos/audio/audio_devices_pref_handler_impl_unittest.cc',
       'browser/chromeos/customization/customization_document_unittest.cc',
       'browser/chromeos/dbus/printer_service_provider_unittest.cc',
       'browser/chromeos/display/display_preferences_unittest.cc',
       'browser/chromeos/drive/change_list_loader_unittest.cc',
       'browser/chromeos/drive/change_list_processor_unittest.cc',
       'browser/chromeos/drive/directory_loader_unittest.cc',
       'browser/chromeos/drive/download_handler_unittest.cc',
       'browser/chromeos/drive/drive_file_stream_reader_unittest.cc',
       'browser/chromeos/drive/drive_integration_service_unittest.cc',
       'browser/chromeos/drive/dummy_file_system.cc',
@@ skipping 2855 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }