Piping for audio encoding.

remoting/host/chromoting_host.h

Index: remoting/host/chromoting_host.h
diff --git a/remoting/host/chromoting_host.h b/remoting/host/chromoting_host.h
index 713f969cbabe76ad0734604fc9ff506679393294..ee745c84c9278264e7cac4dca50ee1f0d97a21c5 100644
--- a/remoting/host/chromoting_host.h
+++ b/remoting/host/chromoting_host.h
@@ -31,6 +31,7 @@ class SessionConfig;
 class CandidateSessionConfig;
 }  // namespace protocol
 
+class AudioEncoder;
 class AudioScheduler;
 class ChromotingHostContext;
 class DesktopEnvironment;
@@ -165,6 +166,10 @@ class ChromotingHost : public base::RefCountedThreadSafe<ChromotingHost>,
   // Creates encoder for the specified configuration.
   static Encoder* CreateEncoder(const protocol::SessionConfig& config);
 
+  // Creates an audio encoder for the specified configuration.
+  static scoped_ptr<AudioEncoder> CreateAudioEncoder(
+      const protocol::SessionConfig& config);
+
   virtual ~ChromotingHost();
 
   void StopScreenRecorder();