Do not pass the string device_id via IPC message to create an audio input stream

content/renderer/media/webrtc_local_audio_renderer.h

 // 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.
 
 #ifndef CONTENT_RENDERER_MEDIA_WEBRTC_LOCAL_AUDIO_RENDERER_H_
 #define CONTENT_RENDERER_MEDIA_WEBRTC_LOCAL_AUDIO_RENDERER_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/synchronization/lock.h"
@@ skipping 57 matching lines @@
   // Called on the AudioInputDevice worker thread.
   virtual void CaptureData(const int16* audio_data,
                            int number_of_channels,
                            int number_of_frames,
                            int audio_delay_milliseconds,
                            double volume) OVERRIDE;
 
   // Can be called on different user thread.
   virtual void SetCaptureFormat(const media::AudioParameters& params) OVERRIDE;
 
-  // Called on the main render thread.
-  virtual void OnCaptureDeviceStopped() OVERRIDE;
-
   // media::AudioRendererSink::RenderCallback implementation.
   // Render() is called on the AudioOutputDevice thread and OnRenderError()
   // on the IO thread.
   virtual int Render(media::AudioBus* audio_bus,
                      int audio_delay_milliseconds) OVERRIDE;
   virtual void OnRenderError() OVERRIDE;
 
   // webrtc::ObserverInterface implementation.
   // Called on the main render thread.
   virtual void OnChanged() OVERRIDE;
@@ skipping 41 matching lines @@
 
   // Protects |loopback_fifo_|, |playing_| and |sink_|.
   mutable base::Lock thread_lock_;
 
   DISALLOW_COPY_AND_ASSIGN(WebRtcLocalAudioRenderer);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_WEBRTC_LOCAL_AUDIO_RENDERER_H_