cros: Enable new cras audio handler by default

chromeos/chromeos.gyp

 # 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': {
     'chromium_code': 1,
   },
   'includes': [
     'chromeos_tools.gypi'
@@ skipping 18 matching lines @@
       'defines': [
         'CHROMEOS_IMPLEMENTATION',
       ],
       'sources': [
         'audio/audio_device.cc',
         'audio/audio_device.h',
         'audio/audio_pref_observer.h',
         'audio/audio_pref_handler.h',
         'audio/cras_audio_handler.cc',
         'audio/cras_audio_handler.h',
+        'audio/mock_cras_audio_handler.h',
         'attestation/attestation_constants.cc',
         'attestation/attestation_constants.h',
         'attestation/attestation_flow.cc',
         'attestation/attestation_flow.h',
         'chromeos_export.h',
         'chromeos_paths.cc',
         'chromeos_paths.h',
         'chromeos_switches.cc',
         'chromeos_switches.h',
         'cryptohome/async_method_caller.cc',
@@ skipping 490 matching lines @@
         '../third_party/cros_system_api/dbus/video_activity_update.proto',
       ],
       'variables': {
         'proto_in_dir': '../third_party/cros_system_api/dbus/',
         'proto_out_dir': 'chromeos/dbus',
       },
       'includes': ['../build/protoc.gypi'],
     },
   ],
 }