Remove dependency on AudioStub in ConnectionToClient

remoting/protocol/ice_connection_to_client.h

Index: remoting/protocol/ice_connection_to_client.h
diff --git a/remoting/protocol/ice_connection_to_client.h b/remoting/protocol/ice_connection_to_client.h
index d2932f5dcbc715a8d53f9dc16cef80d09d05a658..20190d124af4f7de56e36d9c2fc3d4ac8bfa0754 100644
--- a/remoting/protocol/ice_connection_to_client.h
+++ b/remoting/protocol/ice_connection_to_client.h
@@ -38,7 +38,8 @@ class IceConnectionToClient : public ConnectionToClient,
   IceConnectionToClient(
       std::unique_ptr<Session> session,
       scoped_refptr<TransportContext> transport_context,
-      scoped_refptr<base::SingleThreadTaskRunner> video_encode_task_runner);
+      scoped_refptr<base::SingleThreadTaskRunner> video_encode_task_runner,
+      scoped_refptr<base::SingleThreadTaskRunner> audio_task_runner);
   ~IceConnectionToClient() override;
 
   // ConnectionToClient interface.
@@ -49,7 +50,8 @@ class IceConnectionToClient : public ConnectionToClient,
   void OnInputEventReceived(int64_t timestamp) override;
   std::unique_ptr<VideoStream> StartVideoStream(
       std::unique_ptr<webrtc::DesktopCapturer> desktop_capturer) override;
-  AudioStub* audio_stub() override;
+  std::unique_ptr<AudioSendStream> StartAudioStream(
+      std::unique_ptr<AudioSource> audio_source) override;
   ClientStub* client_stub() override;
   void set_clipboard_stub(ClipboardStub* clipboard_stub) override;
   void set_host_stub(HostStub* host_stub) override;
@@ -80,6 +82,7 @@ class IceConnectionToClient : public ConnectionToClient,
   std::unique_ptr<Session> session_;
 
   scoped_refptr<base::SingleThreadTaskRunner> video_encode_task_runner_;
+  scoped_refptr<base::SingleThreadTaskRunner> audio_task_runner_;
 
   IceTransport transport_;