Move audio decoding to protocol layer

remoting/protocol/ice_connection_to_host.h

Index: remoting/protocol/ice_connection_to_host.h
diff --git a/remoting/protocol/ice_connection_to_host.h b/remoting/protocol/ice_connection_to_host.h
index fea50882c9008a5eff9e07ea994680b4d48b5190..36320dccb4aa9a9bdbf32f30361b7675f1fdb464 100644
--- a/remoting/protocol/ice_connection_to_host.h
+++ b/remoting/protocol/ice_connection_to_host.h
@@ -27,6 +27,7 @@
 namespace remoting {
 namespace protocol {
 
+class AudioDecodeScheduler;
 class AudioReader;
 class ClientControlDispatcher;
 class ClientEventDispatcher;
@@ -45,7 +46,9 @@ class IceConnectionToHost : public ConnectionToHost,
   void set_client_stub(ClientStub* client_stub) override;
   void set_clipboard_stub(ClipboardStub* clipboard_stub) override;
   void set_video_renderer(VideoRenderer* video_renderer) override;
-  void set_audio_stub(AudioStub* audio_stub) override;
+  void InitializeAudio(
+      scoped_refptr<base::SingleThreadTaskRunner> audio_decode_task_runner,
+      base::WeakPtr<AudioStub> audio_stub) override;
   void Connect(std::unique_ptr<Session> session,
                scoped_refptr<TransportContext> transport_context,
                HostEventCallback* event_callback) override;
@@ -84,7 +87,8 @@ class IceConnectionToHost : public ConnectionToHost,
   ClientStub* client_stub_ = nullptr;
   ClipboardStub* clipboard_stub_ = nullptr;
   VideoRenderer* video_renderer_ = nullptr;
-  AudioStub* audio_stub_ = nullptr;
+
+  std::unique_ptr<AudioDecodeScheduler> audio_decode_scheduler_;
 
   std::unique_ptr<Session> session_;
   std::unique_ptr<IceTransport> transport_;