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

content/renderer/media/webaudio_capturer_source.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_WEBAUDIO_CAPTURER_SOURCE_H_
 #define CONTENT_RENDERER_MEDIA_WEBAUDIO_CAPTURER_SOURCE_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/synchronization/lock.h"
 #include "media/audio/audio_parameters.h"
@@ skipping 26 matching lines @@
   // setFormat() is called early on, so that we can configure the capturer.
   virtual void setFormat(size_t number_of_channels, float sample_rate) OVERRIDE;
   // MediaStreamAudioDestinationNode periodically calls consumeAudio().
   virtual void consumeAudio(const WebKit::WebVector<const float*>& audio_data,
       size_t number_of_frames) OVERRIDE;
 
   // AudioCapturerSource implementation.
   virtual void Initialize(
       const media::AudioParameters& params,
       media::AudioCapturerSource::CaptureCallback* callback,
-      media::AudioCapturerSource::CaptureEventHandler* event_handler) OVERRIDE;
+      int session_id) OVERRIDE;
 
   virtual void Start() OVERRIDE;
   virtual void Stop() OVERRIDE;
   virtual void SetVolume(double volume) OVERRIDE { }
-  virtual void SetDevice(int session_id) OVERRIDE { }
   virtual void SetAutomaticGainControl(bool enable) OVERRIDE { }
 
  private:
   virtual ~WebAudioCapturerSource();
 
   WebRtcAudioCapturer* capturer_;
 
   int set_format_channels_;
   media::AudioParameters params_;
   media::AudioCapturerSource::CaptureCallback* callback_;
@@ skipping 10 matching lines @@
   // Synchronizes HandleCapture() with AudioCapturerSource calls.
   base::Lock lock_;
   bool started_;
 
   DISALLOW_COPY_AND_ASSIGN(WebAudioCapturerSource);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_WEBAUDIO_CAPTURER_SOURCE_H_