Remove AudioBuffersState usage in Chromium

media/audio/audio_io.h

Index: media/audio/audio_io.h
diff --git a/media/audio/audio_io.h b/media/audio/audio_io.h
index 1e1eba420b14aa049bacbf91a9841ec452e1c6ed..105e32eb362b7dd8caccd40bc8037f74705ddf40 100644
--- a/media/audio/audio_io.h
+++ b/media/audio/audio_io.h
@@ -6,7 +6,6 @@
 #define MEDIA_AUDIO_AUDIO_IO_H_
 
 #include "base/basictypes.h"
-#include "media/audio/audio_buffers_state.h"
 #include "media/base/audio_bus.h"
 
 // Low-level audio output support. To make sound there are 3 objects involved:
@@ -58,10 +57,9 @@ class MEDIA_EXPORT AudioOutputStream {
   class MEDIA_EXPORT AudioSourceCallback {
    public:
     // Provide more data by fully filling |dest|.  The source will return
-    // the number of frames it filled.  |buffers_state| contains current state
-    // of the buffers, and can be used by the source to calculate delay.
-    virtual int OnMoreData(AudioBus* dest,
-                           AudioBuffersState buffers_state) = 0;
+    // the number of frames it filled.  |total_bytes_delay| contains current
+    // number of bytes of delay buffered by the AudioOutputStream.
+    virtual int OnMoreData(AudioBus* dest, uint32 total_bytes_delay) = 0;
 
     // There was an error while playing a buffer. Audio source cannot be
     // destroyed yet. No direct action needed by the AudioStream, but it is