Revert 290359 "Remove AudioBuffersState class."

trunk/src/media/audio/audio_output_resampler.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_AUDIO_AUDIO_OUTPUT_RESAMPLER_H_
 #define MEDIA_AUDIO_AUDIO_OUTPUT_RESAMPLER_H_
 
 #include <map>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/time/time.h"
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_manager.h"
 #include "media/audio/audio_output_dispatcher.h"
 #include "media/audio/audio_parameters.h"
 
 namespace media {
 
 class OnMoreDataConverter;
 
 // AudioOutputResampler is a browser-side resampling and buffering solution
 // which ensures audio data is always output at given parameters.  See the
 // AudioConverter class for details on the conversion process.
 //
 // AOR works by intercepting the AudioSourceCallback provided to StartStream()
-// and redirecting it through an AudioConverter instance.  |total_bytes_delay|
-// is adjusted for buffer delay caused by the conversion process.
+// and redirecting it through an AudioConverter instance.  AudioBuffersState is
+// adjusted for buffer delay caused by the conversion process.
 //
 // AOR will automatically fall back from AUDIO_PCM_LOW_LATENCY to
 // AUDIO_PCM_LINEAR if the output device fails to open at the requested output
 // parameters.
 //
 // TODO(dalecurtis): Ideally the low latency path will be as reliable as the
 // high latency path once we have channel mixing and support querying for the
 // hardware's configured bit depth.  Monitor the UMA stats for fallback and
 // remove fallback support once it's stable.  http://crbug.com/148418
 class MEDIA_EXPORT AudioOutputResampler : public AudioOutputDispatcher {
@@ skipping 42 matching lines @@
   // Whether any streams have been opened through |dispatcher_|, if so we can't
   // fallback on future OpenStream() failures.
   bool streams_opened_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioOutputResampler);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_OUTPUT_RESAMPLER_H_