AudioSharedBuffer

media/audio/audio_parameters.h

Index: media/audio/audio_parameters.h
diff --git a/media/audio/audio_parameters.h b/media/audio/audio_parameters.h
index 03fe043dfadd53e4ae4bf75edc1e9ce5eeadcacf..cad7c8f651a6a4bef79734d6357f5d30eb00eb90 100644
--- a/media/audio/audio_parameters.h
+++ b/media/audio/audio_parameters.h
@@ -26,6 +26,13 @@ struct MEDIA_EXPORT AudioInputBuffer {
   int8 audio[1];
 };
 
+// Used for audio buffer exchange in shared memory between processes with
+// buffer_index counting for synchronization without needing to block.
+struct MEDIA_EXPORT AudioSharedBuffer {
+  uint32 buffer_index;
+  int8 audio[1];
+};
+
 class MEDIA_EXPORT AudioParameters {
  public:
   // TODO(miu): Rename this enum to something that correctly reflects its