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

media/audio/win/audio_low_latency_input_win.h

Index: media/audio/win/audio_low_latency_input_win.h
diff --git a/media/audio/win/audio_low_latency_input_win.h b/media/audio/win/audio_low_latency_input_win.h
index 948a3fb812cb3bdc481eba4644d99cf4a00b7008..a33a582c976a386601e55425d034aba36ee785a8 100644
--- a/media/audio/win/audio_low_latency_input_win.h
+++ b/media/audio/win/audio_low_latency_input_win.h
@@ -75,6 +75,7 @@
 
 namespace media {
 
+class AudioBus;
 class AudioManagerWin;
 
 // AudioInputStream implementation using Windows Core Audio APIs.
@@ -211,6 +212,10 @@ class MEDIA_EXPORT WASAPIAudioInputStream
   // This event will be signaled when capturing shall stop.
   base::win::ScopedHandle stop_capture_event_;
 
+  // Extra audio bus used for storage of deinterleaved data for the OnData
+  // callback.
+  scoped_ptr<media::AudioBus> audio_bus_;
+
   DISALLOW_COPY_AND_ASSIGN(WASAPIAudioInputStream);
 };