Remove ContextLifecycleObserver from NavigatorServiceWorker

third_party/WebKit/Source/modules/serviceworkers/NavigatorServiceWorker.h

 // Copyright 2014 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 NavigatorServiceWorker_h
 #define NavigatorServiceWorker_h
 
-#include "core/dom/ContextLifecycleObserver.h"
 #include "core/frame/Navigator.h"
 #include "modules/ModulesExport.h"
 #include "platform/Supplementable.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class Document;
 class ExceptionState;
 class Navigator;
 class ServiceWorkerContainer;
 
 class MODULES_EXPORT NavigatorServiceWorker final
     : public GarbageCollected<NavigatorServiceWorker>,
-      public Supplement<Navigator>,
-      public ContextLifecycleObserver {
+      public Supplement<Navigator> {
   USING_GARBAGE_COLLECTED_MIXIN(NavigatorServiceWorker);
 
  public:
   static NavigatorServiceWorker* from(Document&);
   static NavigatorServiceWorker& from(Navigator&);
   static NavigatorServiceWorker* toNavigatorServiceWorker(Navigator&);
   static ServiceWorkerContainer* serviceWorker(ExecutionContext*,
                                                Navigator&,
                                                ExceptionState&);
   static ServiceWorkerContainer* serviceWorker(ExecutionContext*,
                                                Navigator&,
                                                String& errorMessage);
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
   explicit NavigatorServiceWorker(Navigator&);
   ServiceWorkerContainer* serviceWorker(LocalFrame*, ExceptionState&);
   ServiceWorkerContainer* serviceWorker(LocalFrame*, String& errorMessage);
 
   static const char* supplementName();
 
-  // ContextLifecycleObserver override.
-  void contextDestroyed() override;
-
   Member<ServiceWorkerContainer> m_serviceWorker;
 };
 
 }  // namespace blink
 
 #endif  // NavigatorServiceWorker_h