Fix AudioPipeReader to use default pipe buffer size.

remoting/host/linux/audio_pipe_reader.h

Index: remoting/host/linux/audio_pipe_reader.h
diff --git a/remoting/host/linux/audio_pipe_reader.h b/remoting/host/linux/audio_pipe_reader.h
index c99d847889c9cda7513b15af03105e0534386f19..33b9b41418cbbf2b66916d30334b1291f83b26d5 100644
--- a/remoting/host/linux/audio_pipe_reader.h
+++ b/remoting/host/linux/audio_pipe_reader.h
@@ -82,6 +82,12 @@ class AudioPipeReader
   base::RepeatingTimer<AudioPipeReader> timer_;
   scoped_refptr<ObserverListThreadSafe<StreamObserver> > observers_;
 
+  // Size of the pipe buffer.
+  int pipe_buffer_size_;
+
+  // Period between pipe reads.
+  base::TimeDelta capture_period_;
+
   // Time when capturing was started.
   base::TimeTicks started_time_;