Replace AudioSilenceDetector with an AudioPowerMonitor.

media/media.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,
     # Override to dynamically link the cras (ChromeOS audio) library.
     'use_cras%': 0,
     # Option e.g. for Linux distributions to link pulseaudio directly
@@ skipping 83 matching lines @@
         'audio/audio_output_dispatcher.cc',
         'audio/audio_output_dispatcher.h',
         'audio/audio_output_dispatcher_impl.cc',
         'audio/audio_output_dispatcher_impl.h',
         'audio/audio_output_ipc.cc',
         'audio/audio_output_ipc.h',
         'audio/audio_output_proxy.cc',
         'audio/audio_output_proxy.h',
         'audio/audio_output_resampler.cc',
         'audio/audio_output_resampler.h',
-        'audio/audio_silence_detector.cc',
-        'audio/audio_silence_detector.h',
+        'audio/audio_power_monitor.cc',
+        'audio/audio_power_monitor.h',
         'audio/audio_source_diverter.h',
         'audio/audio_util.cc',
         'audio/audio_util.h',
         'audio/cras/audio_manager_cras.cc',
         'audio/cras/audio_manager_cras.h',
         'audio/cras/cras_input.cc',
         'audio/cras/cras_input.h',
         'audio/cras/cras_unified.cc',
         'audio/cras/cras_unified.h',
         'audio/cross_process_notification.cc',
@@ skipping 786 matching lines @@
         'audio/async_socket_io_handler_unittest.cc',
         'audio/audio_input_controller_unittest.cc',
         'audio/audio_input_device_unittest.cc',
         'audio/audio_input_unittest.cc',
         'audio/audio_input_volume_unittest.cc',
         'audio/audio_low_latency_input_output_unittest.cc',
         'audio/audio_output_controller_unittest.cc',
         'audio/audio_output_device_unittest.cc',
         'audio/audio_output_proxy_unittest.cc',
         'audio/audio_parameters_unittest.cc',
-        'audio/audio_silence_detector_unittest.cc',
+        'audio/audio_power_monitor_unittest.cc',
         'audio/cross_process_notification_unittest.cc',
         'audio/fake_audio_consumer_unittest.cc',
         'audio/ios/audio_manager_ios_unittest.cc',
         'audio/linux/alsa_output_unittest.cc',
         'audio/mac/audio_auhal_mac_unittest.cc',
         'audio/mac/audio_device_listener_mac_unittest.cc',
         'audio/mac/audio_low_latency_input_mac_unittest.cc',
         'audio/simple_sources_unittest.cc',
         'audio/virtual_audio_input_stream_unittest.cc',
         'audio/virtual_audio_output_stream_unittest.cc',
@@ skipping 789 matching lines @@
           ],
           'sources': [
             'base/simd/sinc_resampler_sse.cc',
             'base/simd/vector_math_sse.cc',
           ],
         }, # end of target media_sse
       ],
     }],
   ],
 }