Replace AudioDecoder::ProduceAudioSamples/ConsumeAudioSamples with read callbacks.

media/filters/audio_renderer_algorithm_base.h

Index: media/filters/audio_renderer_algorithm_base.h
diff --git a/media/filters/audio_renderer_algorithm_base.h b/media/filters/audio_renderer_algorithm_base.h
index af6381d746640988d33ba817b86b36fcc1e26b94..d2a982d2b4ffc9995f5167c880e8d7e6fed5deaa 100644
--- a/media/filters/audio_renderer_algorithm_base.h
+++ b/media/filters/audio_renderer_algorithm_base.h
@@ -69,12 +69,17 @@ class MEDIA_EXPORT AudioRendererAlgorithmBase {
   // Returns whether |queue_| is empty.
   virtual bool IsQueueEmpty();
 
-  // Returns true if we have enough data
+  // Returns true if we have enough data.
   virtual bool IsQueueFull();
 
-  // Returns the number of bytes left in |queue_|.
+  // Returns the number of bytes left in |queue_|, which may be larger than
+  // QueueCapacity() in the event that a read callback delivered more data than
+  // |queue_| was intending to hold.
   virtual uint32 QueueSize();
 
+  // Returns the capacity of |queue_|.
+  virtual uint32 QueueCapacity();
+
   // Increase the capacity of |queue_| if possible.
   virtual void IncreaseQueueCapacity();