media: Increase the default audio buffer size for encrypted streams

media/renderers/audio_renderer_impl.h

Index: media/renderers/audio_renderer_impl.h
diff --git a/media/renderers/audio_renderer_impl.h b/media/renderers/audio_renderer_impl.h
index 8b8273cb93d574bd6170eca752121b6379bf9e8e..e0e9978edf9a3c8c4aa077ffe82b2e1fca7d6d2d 100644
--- a/media/renderers/audio_renderer_impl.h
+++ b/media/renderers/audio_renderer_impl.h
@@ -245,6 +245,9 @@ class MEDIA_EXPORT AudioRendererImpl
   // given to the |algorithm_| for efficient playback rate changes.
   ChannelLayout last_decoded_channel_layout_;
 
+  // Whether the stream is possibly encrypted.
+  bool is_encrypted_;
+
   // After Initialize() has completed, all variables below must be accessed
   // under |lock_|. ------------------------------------------------------------
   base::Lock lock_;