[Presentation API] (1-UA) fire PresentationConnection onterminate event if receiver page gets destr…

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

 // Copyright 2016 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 WebPresentationReceiver_h
 #define WebPresentationReceiver_h
 
 #include "public/platform/WebCommon.h"
 
 namespace blink {
 
 class WebPresentationConnectionClient;
+enum class WebPresentationConnectionState;
 
 // The delegate Blink provides to WebPresentationReceiverClient in order to get
 // updates.
 class BLINK_PLATFORM_EXPORT WebPresentationReceiver {
  public:
   virtual ~WebPresentationReceiver() = default;
 
   // Called when receiver page gets an incoming connection.
   virtual void onReceiverConnectionAvailable(
       WebPresentationConnectionClient*) = 0;
+
+  // Called when receiver page gets destroyed.
+  virtual void didChangeSessionState(WebPresentationConnectionState) = 0;
+
+  // Called when any PresentationConnection object on receiver page invokes
+  // connnection.terminate().
+  virtual void closeWindow() = 0;
 };
 
 }  // namespace blink
 
 #endif  // WebPresentationReceiver_h