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

content/renderer/media/webrtc_local_audio_renderer.h

Index: content/renderer/media/webrtc_local_audio_renderer.h
diff --git a/content/renderer/media/webrtc_local_audio_renderer.h b/content/renderer/media/webrtc_local_audio_renderer.h
index c48027bf65d8eb04c1cb02a90ebdba8580d90a8a..0bd310ab2d36d403a84b6b2ff14e2322808bee5b 100644
--- a/content/renderer/media/webrtc_local_audio_renderer.h
+++ b/content/renderer/media/webrtc_local_audio_renderer.h
@@ -75,9 +75,6 @@ class CONTENT_EXPORT WebRtcLocalAudioRenderer
   // 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.