Add AudioTrackRecorder for audio component of MediaStream recording.

content/content_tests.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': {
     'layouttest_support_content_sources': [
       'public/test/layouttest_support.h',
       'public/test/nested_message_pump_android.cc',
       'public/test/nested_message_pump_android.h',
@@ skipping 727 matching lines @@
     # WebRTC-specific sources. Put WebRTC plugin-related stuff further below.
     'content_unittests_webrtc_sources': [
       'browser/media/webrtc_internals_unittest.cc',
       'browser/renderer_host/media/webrtc_identity_service_host_unittest.cc',
       'browser/renderer_host/p2p/socket_host_tcp_server_unittest.cc',
       'browser/renderer_host/p2p/socket_host_tcp_unittest.cc',
       'browser/renderer_host/p2p/socket_host_test_utils.cc',
       'browser/renderer_host/p2p/socket_host_test_utils.h',
       'browser/renderer_host/p2p/socket_host_udp_unittest.cc',
       'browser/renderer_host/p2p/socket_host_unittest.cc',
+      'renderer/media/audio_track_recorder_unittest.cc',
       'renderer/media/media_recorder_handler_unittest.cc',
       'renderer/media/media_stream_audio_processor_unittest.cc',
       'renderer/media/media_stream_constraints_util_unittest.cc',
       'renderer/media/media_stream_dispatcher_unittest.cc',
       'renderer/media/media_stream_video_capturer_source_unittest.cc',
       'renderer/media/media_stream_video_renderer_sink_unittest.cc',
       'renderer/media/media_stream_video_source_unittest.cc',
       'renderer/media/media_stream_video_track_unittest.cc',
       'renderer/media/mock_media_constraint_factory.cc',
       'renderer/media/mock_media_stream_registry.cc',
@@ skipping 435 matching lines @@
           ],
         }],
         ['OS == "android"', {
           'sources': [ '<@(content_unittests_android_sources)' ],
           'sources!': [
             'browser/geolocation/network_location_provider_unittest.cc',
             'browser/geolocation/wifi_data_provider_common_unittest.cc',
             'browser/power_usage_monitor_impl_unittest.cc',
             'browser/renderer_host/begin_frame_observer_proxy_unittest.cc',
             'browser/webui/url_data_manager_backend_unittest.cc',
+            'renderer/media/audio_track_recorder_unittest.cc',
             'renderer/media/media_recorder_handler_unittest.cc',
             'renderer/media/video_track_recorder_unittest.cc',
           ],
           'dependencies': [
             '../testing/android/native_test.gyp:native_test_native_code',
           ],
           'dependencies!': [
             '../device/battery/battery.gyp:device_battery',
           ],
         }],
@@ skipping 985 matching lines @@
                   'content_unittests_apk.isolate',
                 ],
               },
             ],
           },
         ],
       ],
     }],
   ],
 }