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

third_party/WebKit/public/platform/modules/presentation/WebPresentationClient.h

 // 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.
 
 #ifndef WebPresentationClient_h
 #define WebPresentationClient_h
 
 #include "public/platform/WebCallbacks.h"
 #include "public/platform/WebCommon.h"
 
@@ skipping 63 matching lines @@
   // |proxy|: proxy of blink connection object initiating send Blob data
   //          request. Does not pass ownership.
   virtual void sendBlobData(const WebURL& presentationUrl,
                             const WebString& presentationId,
                             const uint8_t* data,
                             size_t length,
                             const WebPresentationConnectionProxy*) = 0;
 
   // Called when the frame requests to close an existing session.
   virtual void closeSession(const WebURL& presentationUrl,
-                            const WebString& presentationId) = 0;
+                            const WebString& presentationId,
+                            const WebPresentationConnectionProxy*) = 0;
 
   // Called when the frame requests to terminate an existing session.
   virtual void terminateSession(const WebURL& presentationUrl,
                                 const WebString& presentationId) = 0;
 
   // Called when the frame wants to know the availability of a presentation
   // display for |availabilityUrl|.
   virtual void getAvailability(
       const WebVector<WebURL>& availabilityUrls,
       std::unique_ptr<WebPresentationAvailabilityCallbacks>) = 0;
 
   // Start listening to changes in presentation displays availability. The
   // observer will be notified in case of a change. The observer is
   // respensible to call stopListening() before being destroyed.
   virtual void startListening(WebPresentationAvailabilityObserver*) = 0;
 
   // Stop listening to changes in presentation displays availability. The
   // observer will no longer be notified in case of a change.
   virtual void stopListening(WebPresentationAvailabilityObserver*) = 0;
 
   // Called when a defaultRequest has been set. It sends the url associated
   // with it for the embedder.
   virtual void setDefaultPresentationUrls(const WebVector<WebURL>&) = 0;
 };
 
 }  // namespace blink
 
 #endif  // WebPresentationClient_h