Remove dependency of audio_device on metrics_default.

webrtc/modules/audio_device/audio_device.gypi

 # Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 {
   'targets': [
@@ skipping 71 matching lines @@
             # Don't link these into Chrome since they contain static data.
             'dummy/file_audio_device_factory.cc',
             'dummy/file_audio_device_factory.h',
           ],
         }],
         ['include_internal_audio_device==1', {
           'sources': [
             'audio_device_impl.cc',
             'audio_device_impl.h',
           ],
-          'dependencies': [
-            '<(webrtc_root)/system_wrappers/system_wrappers.gyp:metrics_default',
-          ],
           'conditions': [
             ['use_dummy_audio_file_devices==1', {
               'defines': [
                'WEBRTC_DUMMY_FILE_DEVICES',
               ],
             }, { # use_dummy_audio_file_devices==0, so use a platform device.
               'conditions': [
                 ['OS=="android"', {
                   'sources': [
                     'android/audio_device_template.h',
@@ skipping 159 matching lines @@
       'targets': [
         {
           'target_name': 'audio_device_tests',
           'type': 'executable',
           'dependencies': [
             'audio_device',
             'webrtc_utility',
             '<(webrtc_root)/test/test.gyp:test_support_main',
             '<(DEPTH)/testing/gtest.gyp:gtest',
             '<(webrtc_root)/system_wrappers/system_wrappers.gyp:system_wrappers',
+            '<(webrtc_root)/system_wrappers/system_wrappers.gyp:metrics_default',
           ],
           'sources': [
             'test/audio_device_test_api.cc',
             'test/audio_device_test_defines.h',
           ],
         },
       ], # targets
     }], # include_tests==1 and OS!=ios
   ],
 }