Switch OnMoreData() to use AudioBus.

media/base/limits.h

 // Copyright (c) 2011 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.
 
 // Contains limit definition constants for the media subsystem.
 
 #ifndef MEDIA_BASE_LIMITS_H_
 #define MEDIA_BASE_LIMITS_H_
 
 #include "base/basictypes.h"
@@ skipping 18 matching lines @@
   //   - AAC files are limited to 96 kHz.
   //   - MP3 files are limited to 48 kHz.
   //   - Vorbis used to be limited to 96 KHz, but no longer has that
   //     restriction.
   //   - Most PC audio hardware is limited to 192 KHz.
   kMaxSampleRate = 192000,
   kMinSampleRate = 8000,
   kMaxChannels = 32,
   kMaxBitsPerSample = 64,
   kMaxSamplesPerPacket = kMaxSampleRate,
+  kMaxPacketSizeInBytes =
+      (kMaxBitsPerSample / 8) * kMaxChannels * kMaxSamplesPerPacket,
 };
 
 }  // namespace limits
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_LIMITS_H_