Tab Audio Capture: Browser-side connect/disconnect functionality.

media/audio/audio_output_controller.h

Index: media/audio/audio_output_controller.h
diff --git a/media/audio/audio_output_controller.h b/media/audio/audio_output_controller.h
index 3dae719856508cd6a25e28dc22cd84305a35dd58..ef6e61c5b93d19528c671a8a4ae5b7feb66968a1 100644
--- a/media/audio/audio_output_controller.h
+++ b/media/audio/audio_output_controller.h
@@ -63,6 +63,10 @@ class MessageLoop;
 
 namespace media {
 
+// TODO(miu): STUB
+class DivertedAudioOutputStream : public AudioOutputStream {
+};
+
 class MEDIA_EXPORT AudioOutputController
     : public base::RefCountedThreadSafe<AudioOutputController>,
       public AudioOutputStream::AudioSourceCallback,
@@ -158,6 +162,15 @@ class MEDIA_EXPORT AudioOutputController
   // to being called.
   virtual void OnDeviceChange() OVERRIDE;
 
+  // Creates a DivertedAudioOutputStream and diverts audio data to it, away from
+  // the existing AudioOutputStream.  A call to Revert() restores the previous,
+  // normal audio data flow.
+  DivertedAudioOutputStream* Divert();
+
+  // Restores the previous, normal audio data flow (i.e., the state of the
+  // stream before Divert() was called).  |aos| is destroyed.
+  void Revert(DivertedAudioOutputStream* aos);
+
  protected:
     // Internal state of the source.
   enum State {