Switch OnMoreData() to use AudioBus.

ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_audio.h

Index: ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_audio.h
diff --git a/ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_audio.h b/ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_audio.h
index 07d5a7dbc4f3c8822f647d0e52ea948b2c7c7d0d..1c63ae415c67718c16f2b55b273d7cf1f0c6f6ad 100644
--- a/ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_audio.h
+++ b/ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_audio.h
@@ -12,6 +12,7 @@
 #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"
 
@@ -59,6 +60,11 @@ class PluginAudio : public PluginResource {
   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 user's integer audio data.
+  int audio_buffer_size_bytes_;
+  scoped_array<uint8_t> audio_buffer_;
 
   IMPLEMENT_RESOURCE(PluginAudio);
   NACL_DISALLOW_COPY_AND_ASSIGN(PluginAudio);