[Presentation API] Use connection proxy to change connection state to 'closed'

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 <memory>
@@ skipping 169 matching lines @@
 
 class MockPresentationConnection : public blink::mojom::PresentationConnection {
  public:
   void OnMessage(blink::mojom::ConnectionMessagePtr message,
                  const base::Callback<void(bool)>& send_message_cb) override {
     OnConnectionMessageReceived(*message);
   }
   MOCK_METHOD1(OnConnectionMessageReceived,
                void(const blink::mojom::ConnectionMessage& message));
   MOCK_METHOD1(DidChangeState, void(PresentationConnectionState state));
+  MOCK_METHOD0(OnClose, void());
 };
 
 class MockPresentationServiceClient
     : public blink::mojom::PresentationServiceClient {
  public:
   MOCK_METHOD2(OnScreenAvailabilityUpdated,
                void(const GURL& url, bool available));
   MOCK_METHOD2(OnConnectionStateChanged,
                void(const content::PresentationSessionInfo& connection,
                     PresentationConnectionState new_state));
@@ skipping 724 matching lines @@
   mock_delegate_.set_screen_availability_listening_supported(false);
   base::RunLoop run_loop;
   EXPECT_CALL(mock_client_,
               OnScreenAvailabilityNotSupported(presentation_url1_))
       .WillOnce(InvokeWithoutArgs(&run_loop, &base::RunLoop::Quit));
   ListenForScreenAvailabilityAndWait(presentation_url1_, false);
   run_loop.Run();
 }
 
 }  // namespace content