Make DOMWindowProperty a thin wrapper of ContextLifecycleObserver

third_party/WebKit/Source/modules/installedapp/InstalledAppController.cpp

 // 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.
 
 #include "modules/installedapp/InstalledAppController.h"
 
 #include "core/frame/LocalFrame.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "public/platform/WebSecurityOrigin.h"
 
@@ skipping 33 matching lines @@
   // When detached, the client is no longer valid.
   if (!m_client) {
     callback.release()->onError();
     return;
   }
 
   // Client is expected to take ownership of the callback
   m_client->getInstalledRelatedApps(url, std::move(callback));
 }
 
-void InstalledAppController::frameDestroyed() {
+void InstalledAppController::contextDestroyed() {
   m_client = nullptr;
-  DOMWindowProperty::frameDestroyed();
+  DOMWindowProperty::contextDestroyed();
 }
 
 DEFINE_TRACE(InstalledAppController) {
   Supplement<LocalFrame>::trace(visitor);
   DOMWindowProperty::trace(visitor);
 }
 
 }  // namespace blink