Reland 15721002: Hook up the device selection to the WebAudio live audio

content/renderer/media/renderer_webaudiodevice_impl.h

Index: content/renderer/media/renderer_webaudiodevice_impl.h
diff --git a/content/renderer/media/renderer_webaudiodevice_impl.h b/content/renderer/media/renderer_webaudiodevice_impl.h
index 23a46ab2909a3ca6682ee1feac61a66f81bcb241..5a8161fde83a9f138788366079e0e51c5c4eaf52 100644
--- a/content/renderer/media/renderer_webaudiodevice_impl.h
+++ b/content/renderer/media/renderer_webaudiodevice_impl.h
@@ -23,7 +23,8 @@ class RendererWebAudioDeviceImpl
       public media::AudioRendererSink::RenderCallback {
  public:
   RendererWebAudioDeviceImpl(const media::AudioParameters& params,
-                             WebKit::WebAudioDevice::RenderCallback* callback);
+                             WebKit::WebAudioDevice::RenderCallback* callback,
+                             int session_id);
   virtual ~RendererWebAudioDeviceImpl();
 
   // WebKit::WebAudioDevice implementation.
@@ -54,6 +55,9 @@ class RendererWebAudioDeviceImpl
   // When non-NULL, we are started.  When NULL, we are stopped.
   scoped_refptr<media::AudioOutputDevice> output_device_;
 
+  // ID to allow browser to select the correct input device for unified IO.
+  int session_id_;
+
   DISALLOW_COPY_AND_ASSIGN(RendererWebAudioDeviceImpl);
 };