[PresentationSevice] Use PresentationConnection to send messages from

content/browser/presentation/presentation_service_impl_unittest.cc

 // Copyright 2015 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 "content/browser/presentation/presentation_service_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <iterator>
@@ skipping 610 matching lines @@
       .WillOnce(SaveArg<0>(&callback));
 
   blink::mojom::PresentationServiceClientPtr client_ptr;
   client_binding_.reset(
       new mojo::Binding<blink::mojom::PresentationServiceClient>(
           &mock_client_, mojo::MakeRequest(&client_ptr)));
   service_impl.controller_delegate_ = nullptr;
   service_impl.SetClient(std::move(client_ptr));
   EXPECT_FALSE(callback.is_null());
 
-  // NO-OP for ControllerPresentationServiceDelegate API functions
   PresentationInfo presentation_info(presentation_url1_, kPresentationId);
-  EXPECT_CALL(mock_delegate_, ListenForConnectionMessages(_, _, _, _)).Times(0);
-  service_impl.ListenForConnectionMessages(presentation_info);
 
   // Client gets notified of receiver connections.
   blink::mojom::PresentationConnectionPtr controller_connection;
   MockPresentationConnection mock_presentation_connection;
   mojo::Binding<blink::mojom::PresentationConnection> connection_binding(
       &mock_presentation_connection, mojo::MakeRequest(&controller_connection));
   blink::mojom::PresentationConnectionPtr receiver_connection;
   EXPECT_CALL(mock_client_,
               OnReceiverConnectionAvailable(InfoEquals(presentation_info)));
   callback.Run(presentation_info, std::move(controller_connection),
                mojo::MakeRequest(&receiver_connection));
   base::RunLoop().RunUntilIdle();
 
   EXPECT_CALL(mock_receiver_delegate, RemoveObserver(_, _)).Times(1);
 }
 
 }  // namespace content