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

content/renderer/presentation/presentation_dispatcher.cc

Index: content/renderer/presentation/presentation_dispatcher.cc
diff --git a/content/renderer/presentation/presentation_dispatcher.cc b/content/renderer/presentation/presentation_dispatcher.cc
index 7621c0193218aaaef9a585d0298021a993426978..f3a4f9ec80da77911150969e0362b65ff9a2a6c8 100644
--- a/content/renderer/presentation/presentation_dispatcher.cc
+++ b/content/renderer/presentation/presentation_dispatcher.cc
@@ -282,9 +282,14 @@ void PresentationDispatcher::closeSession(
                                          presentationId.utf8());
 }
 
-void PresentationDispatcher::terminateSession(
+void PresentationDispatcher::terminateConnection(
     const blink::WebURL& presentationUrl,
     const blink::WebString& presentationId) {
+  if (receiver_) {
+    receiver_->terminateConnection();
+    return;
+  }
+
   ConnectToPresentationServiceIfNeeded();
   presentation_service_->Terminate(presentationUrl, presentationId.utf8());
 }
@@ -403,6 +408,14 @@ void PresentationDispatcher::OnDestruct() {
   delete this;
 }
 
+void PresentationDispatcher::WidgetWillClose() {
+  if (!receiver_)
+    return;
+
+  receiver_->didChangeSessionState(
+      blink::WebPresentationConnectionState::Terminated);
+}
+
 void PresentationDispatcher::OnScreenAvailabilityUpdated(const GURL& url,
                                                          bool available) {
   auto* listening_status = GetListeningStatus(url);