Support (E)AC3 passthrough

media/base/audio_bus.h

Index: media/base/audio_bus.h
diff --git a/media/base/audio_bus.h b/media/base/audio_bus.h
index 6d381ccac3daa3c9325fb9d4af99259e4cef3825..b5f4660d4b927617df36ed0f217672a63b7bbd1b 100644
--- a/media/base/audio_bus.h
+++ b/media/base/audio_bus.h
@@ -72,6 +72,12 @@ class MEDIA_EXPORT AudioBus {
   void SetChannelData(int channel, float* data);
   void set_frames(int frames);
 
+  int data_size() const { return data_size_; }
+  void set_data_size(int data_size) { data_size_ = data_size; }
+
+  int is_raw_format() const { return is_raw_format_; }
+  void set_is_raw_format(bool is_raw_format) { is_raw_format_ = is_raw_format; }
+
   // Overwrites the sample values stored in this AudioBus instance with values
   // from a given interleaved |source_buffer| with expected layout
   // [ch0, ch1, ..., chN, ch0, ch1, ...] and sample values in the format
@@ -209,6 +215,8 @@ class MEDIA_EXPORT AudioBus {
 
   // Contiguous block of channel memory.
   std::unique_ptr<float, base::AlignedFreeDeleter> data_;
+  int data_size_;
+  bool is_raw_format_;
 
   // One float pointer per channel pointing to a contiguous block of memory for
   // that channel. If the memory is owned by this instance, this will