Improved AGC update scheme for the audio backend in Chrome

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 41 matching lines @@
         '../third_party/opus/opus.gyp:opus',
         '../ui/ui.gyp:ui',
       ],
       'defines': [
         'MEDIA_IMPLEMENTATION',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
+        'audio/agc_audio_stream.h',
         'audio/android/audio_manager_android.cc',
         'audio/android/audio_manager_android.h',
         'audio/android/opensles_input.cc',
         'audio/android/opensles_input.h',
         'audio/android/opensles_output.cc',
         'audio/android/opensles_output.h',
         'audio/async_socket_io_handler.h',
         'audio/async_socket_io_handler_posix.cc',
         'audio/async_socket_io_handler_win.cc',
         'audio/audio_buffers_state.cc',
         'audio/audio_buffers_state.h',
         'audio/audio_device_name.cc',
         'audio/audio_device_name.h',
         'audio/audio_device_thread.cc',
         'audio/audio_device_thread.h',
         'audio/audio_input_controller.cc',
         'audio/audio_input_controller.h',
         'audio/audio_input_device.cc',
         'audio/audio_input_device.h',
         'audio/audio_input_ipc.cc',
         'audio/audio_input_ipc.h',
-        'audio/audio_input_stream_impl.cc',
-        'audio/audio_input_stream_impl.h',
         'audio/audio_io.h',
         'audio/audio_manager.cc',
         'audio/audio_manager.h',
         'audio/audio_manager_base.cc',
         'audio/audio_manager_base.h',
         'audio/audio_output_controller.cc',
         'audio/audio_output_controller.h',
         'audio/audio_output_device.cc',
         'audio/audio_output_device.h',
         'audio/audio_output_dispatcher.cc',
@@ skipping 1602 matching lines @@
           'sources': [
             'tools/media_bench/media_bench.cc',
           ],
           # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
           'msvs_disabled_warnings': [ 4267, ],
         },
       ],
     }],
   ],
 }