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

media/base/audio_bus.h

Index: media/base/audio_bus.h
diff --git a/media/base/audio_bus.h b/media/base/audio_bus.h
index 56ef9777d8000526bdf2ba9acf8ab6ed7f809731..c5b161f0236082728db2bd97b25ba9de7a9e1c60 100644
--- a/media/base/audio_bus.h
+++ b/media/base/audio_bus.h
@@ -108,10 +108,9 @@ class MEDIA_EXPORT AudioBus {
   // the channels are valid.
   void SwapChannels(int a, int b);
 
- private:
-  friend struct base::DefaultDeleter<AudioBus>;
-  ~AudioBus();
+  virtual ~AudioBus();
 
+ private:
   AudioBus(int channels, int frames);
   AudioBus(int channels, int frames, float* data);
   AudioBus(int frames, const std::vector<float*>& channel_data);