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

content/renderer/presentation/presentation_connection_proxy.h

 // Copyright 2017 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.
 
 #ifndef CONTENT_RENDERER_PRESENTATION_PRESENTATION_CONNECTION_PROXY_H_
 #define CONTENT_RENDERER_PRESENTATION_PRESENTATION_CONNECTION_PROXY_H_
 
 #include "base/callback.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "third_party/WebKit/public/platform/modules/presentation/WebPresentationConnectionProxy.h"
@@ skipping 64 matching lines @@
   ~PresentationConnectionProxy() override;
 
   virtual void SendConnectionMessage(
       blink::mojom::ConnectionMessagePtr connection_message,
       const OnMessageCallback& callback) const;
 
   // blink::mojom::PresentationConnection implementation
   void OnMessage(blink::mojom::ConnectionMessagePtr message,
                  const OnMessageCallback& callback) override;
   void DidChangeState(content::PresentationConnectionState state) override;
+  void OnClose() override;
+
+  // blink::WebPresentationConnectionProxy implementation.
+  void close() const override;
 
  protected:
   explicit PresentationConnectionProxy(
       blink::WebPresentationConnection* source_connection);
   mojo::Binding<blink::mojom::PresentationConnection> binding_;
   mojo::InterfacePtr<blink::mojom::PresentationConnection>
       target_connection_ptr_;
 
  private:
   // Raw pointer to Blink connection object owning this proxy object. Does not
@@ skipping 26 matching lines @@
 
   // Sets |target_connection_ptr_| to |controller_connection_ptr|. Should be
   // called only once.
   void BindControllerConnection(
       blink::mojom::PresentationConnectionPtr controller_connection_ptr);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_PRESENTATION_PRESENTATION_CONNECTION_PROXY_H_