Switch OnMoreData() to use AudioBus.

ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_audio.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 NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PLUGIN_AUDIO_H_
 #define NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PLUGIN_AUDIO_H_
 
 #include <pthread.h>
 #include "native_client/src/include/nacl_base.h"
 #include "native_client/src/include/nacl_macros.h"
 #include "native_client/src/include/portability.h"
 #include "native_client/src/include/ref_counted.h"
 #include "native_client/src/shared/ppapi_proxy/plugin_resource.h"
 #include "native_client/src/shared/srpc/nacl_srpc.h"
+#include "media/base/audio_bus.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/ppb_audio.h"
 
 namespace ppapi_proxy {
 
 enum PluginAudioState {
   AUDIO_INCOMPLETE = 0,  // StreamCreated not yet invoked
   AUDIO_PENDING,         // Incomplete and app requested StartPlayback
   AUDIO_READY,           // StreamCreated invoked, ready for playback
   AUDIO_PLAYING          // Audio in playback
@@ skipping 27 matching lines @@
   PP_Resource resource_;
   NaClSrpcImcDescType socket_;
   NaClSrpcImcDescType shm_;
   size_t shm_size_;
   void *shm_buffer_;
   PluginAudioState state_;
   uintptr_t thread_id_;
   bool thread_active_;
   PPB_Audio_Callback user_callback_;
   void* user_data_;
+  // AudioBus for shuttling data across the shared memory.
+  scoped_ptr<media::AudioBus> audio_bus_;
+  // Internal buffer for client's integer audio data.
+  int client_buffer_size_bytes_;
+  scoped_array<uint8_t> client_buffer_;
 
   IMPLEMENT_RESOURCE(PluginAudio);
   NACL_DISALLOW_COPY_AND_ASSIGN(PluginAudio);
 };
 
 }  // namespace ppapi_proxy
 
 #endif  // NATIVE_CLIENT_SRC_SHARED_PPAPI_PROXY_PLUGIN_AUDIO_H_