Remove dependency on AudioStub in ConnectionToClient

remoting/host/chromoting_host_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "remoting/host/chromoting_host.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 109 matching lines @@
     connection2_->set_client_stub(&client_stub2_);
   }
 
   // Helper method to pretend a client is connected to ChromotingHost.
   void SimulateClientConnection(int connection_index, bool authenticate,
                                 bool reject) {
     std::unique_ptr<protocol::ConnectionToClient> connection = std::move(
         (connection_index == 0) ? owned_connection1_ : owned_connection2_);
     protocol::ConnectionToClient* connection_ptr = connection.get();
     std::unique_ptr<ClientSession> client(new ClientSession(
-        host_.get(), task_runner_ /* audio_task_runner */,
-        std::move(connection), desktop_environment_factory_.get(),
+        host_.get(), std::move(connection), desktop_environment_factory_.get(),
         base::TimeDelta(), nullptr, std::vector<HostExtension*>()));
     ClientSession* client_ptr = client.get();
 
     connection_ptr->set_host_stub(client.get());
     get_client(connection_index) = client_ptr;
 
     // |host| is responsible for deleting |client| from now on.
     host_->clients_.push_back(client.release());
 
     if (authenticate) {
@@ skipping 249 matching lines @@
 
   ExpectClientConnected(0);
   SimulateClientConnection(0, true, false);
 
   ExpectClientDisconnected(0);
   DisconnectAllClients();
   testing::Mock::VerifyAndClearExpectations(&host_status_observer_);
 }
 
 }  // namespace remoting