Share one thread between all AudioOutputControllers instead of creating one per stream.

media/media.gyp

 # Copyright (c) 2010 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,
     'player_x11_renderer%': 'x11',
   },
   'targets': [
     {
       'target_name': 'media',
       'type': '<(library)',
       'dependencies': [
         '../base/base.gyp:base',
         '../third_party/ffmpeg/ffmpeg.gyp:ffmpeg',
       ],
       'include_dirs': [
         '..',
       ],
       'msvs_guid': '6AE76406-B03B-11DD-94B1-80B556D89593',
       'sources': [
         'audio/audio_io.h',
         'audio/audio_input_controller.cc',
         'audio/audio_input_controller.h',
+        'audio/audio_manager.h',
+        'audio/audio_manager.cc',
+        'audio/audio_manager_base.h',
+        'audio/audio_manager_base.cc',
         'audio/audio_output_controller.cc',
         'audio/audio_output_controller.h',
         'audio/audio_util.cc',
         'audio/audio_util.h',
         'audio/fake_audio_input_stream.cc',
         'audio/fake_audio_input_stream.h',
         'audio/fake_audio_output_stream.cc',
         'audio/fake_audio_output_stream.h',
         'audio/linux/audio_manager_linux.cc',
         'audio/linux/audio_manager_linux.h',
@@ skipping 589 matching lines @@
       ],
     }],
   ],
 }
 
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