Remove dependency on AudioStub in ConnectionToClient

remoting/host/chromoting_host.cc

Index: remoting/host/chromoting_host.cc
diff --git a/remoting/host/chromoting_host.cc b/remoting/host/chromoting_host.cc
index 4cc660627434707a98eed4932d764f1fad2a7557..0dd25a957dff15bc79fadf0836494b88eae9a6b1 100644
--- a/remoting/host/chromoting_host.cc
+++ b/remoting/host/chromoting_host.cc
@@ -272,14 +272,13 @@ void ChromotingHost::OnIncomingSession(
   } else {
     connection.reset(new protocol::IceConnectionToClient(
         base::WrapUnique(session), transport_context_,
-        video_encode_task_runner_));
+        video_encode_task_runner_, audio_task_runner_));
   }
 
   // Create a ClientSession object.
-  ClientSession* client =
-      new ClientSession(this, audio_task_runner_, std::move(connection),
-                        desktop_environment_factory_, max_session_duration_,
-                        pairing_registry_, extensions_.get());
+  ClientSession* client = new ClientSession(
+      this, std::move(connection), desktop_environment_factory_,
+      max_session_duration_, pairing_registry_, extensions_.get());
 
   clients_.push_back(client);
 }