Make DOMWindowProperty a thin wrapper of ContextLifecycleObserver

third_party/WebKit/Source/modules/presentation/PresentationController.cpp

 // 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 "modules/presentation/PresentationController.h"
 
 #include "core/frame/LocalFrame.h"
 #include "modules/presentation/PresentationConnection.h"
 #include "public/platform/modules/presentation/WebPresentationClient.h"
 #include "wtf/PtrUtil.h"
@@ skipping 122 matching lines @@
     presentationUrls[0] = url;
 
   m_client->setDefaultPresentationUrls(presentationUrls);
 }
 
 void PresentationController::registerConnection(
     PresentationConnection* connection) {
   m_connections.add(connection);
 }
 
-void PresentationController::frameDestroyed() {
+void PresentationController::contextDestroyed() {
   if (m_client) {
     m_client->setController(nullptr);
     m_client = nullptr;
   }
-  DOMWindowProperty::frameDestroyed();
+  DOMWindowProperty::contextDestroyed();
 }
 
 PresentationConnection* PresentationController::findConnection(
     WebPresentationConnectionClient* connectionClient) {
   for (const auto& connection : m_connections) {
     if (connection->matches(connectionClient))
       return connection.get();
   }
 
   return nullptr;
 }
 
 }  // namespace blink