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

content/renderer/media/audio_input_message_filter.h

Index: content/renderer/media/audio_input_message_filter.h
diff --git a/content/renderer/media/audio_input_message_filter.h b/content/renderer/media/audio_input_message_filter.h
index 82af71e8717f3975770a556a79e2fe5ca80fa186..3f267af8f99a1bd61a384033dde58c9bf4b3e491 100644
--- a/content/renderer/media/audio_input_message_filter.h
+++ b/content/renderer/media/audio_input_message_filter.h
@@ -40,9 +40,9 @@ class CONTENT_EXPORT AudioInputMessageFilter
   virtual int AddDelegate(
       media::AudioInputIPCDelegate* delegate) OVERRIDE;
   virtual void RemoveDelegate(int id) OVERRIDE;
-  virtual void CreateStream(int stream_id, const media::AudioParameters& params,
-      const std::string& device_id, bool automatic_gain_control) OVERRIDE;
-  virtual void StartDevice(int stream_id, int session_id) OVERRIDE;
+  virtual void CreateStream(
+      int stream_id, int session_id, const media::AudioParameters& params,
+      bool automatic_gain_control) OVERRIDE;
   virtual void RecordStream(int stream_id) OVERRIDE;
   virtual void CloseStream(int stream_id) OVERRIDE;
   virtual void SetVolume(int stream_id, double volume) OVERRIDE;
@@ -80,9 +80,6 @@ class CONTENT_EXPORT AudioInputMessageFilter
   void OnStreamStateChanged(int stream_id,
                             media::AudioInputIPCDelegate::State state);
 
-  // Notification of the opened device of an audio session.
-  void OnDeviceStarted(int stream_id, const std::string& device_id);
-
   // A map of stream ids to delegates.
   IDMap<media::AudioInputIPCDelegate> delegates_;