Modifies AudioInputCallback::OnData and use media::AudioBus instead of plain byte vector

media/audio/fake_audio_input_stream.h

Index: media/audio/fake_audio_input_stream.h
diff --git a/media/audio/fake_audio_input_stream.h b/media/audio/fake_audio_input_stream.h
index 8dc24271dbedd07912e27ffb09d56611c463c811..e6c625e6b3a2dd843630728667a1e2efd7e5f8ec 100644
--- a/media/audio/fake_audio_input_stream.h
+++ b/media/audio/fake_audio_input_stream.h
@@ -18,6 +18,7 @@
 
 namespace media {
 
+class AudioBus;
 class AudioManagerBase;
 
 class MEDIA_EXPORT FakeAudioInputStream
@@ -68,6 +69,7 @@ class MEDIA_EXPORT FakeAudioInputStream
   int beep_generated_in_buffers_;
   int beep_period_in_frames_;
   int frames_elapsed_;
+  scoped_ptr<media::AudioBus> audio_bus_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeAudioInputStream);
 };