ServiceWorkerContainer should override contextDestroyed and clear m_provider

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

 // 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.
 
 #include "modules/serviceworkers/NavigatorServiceWorker.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Navigator.h"
@@ skipping 55 matching lines @@
     }
     if (!m_serviceWorker && frame) {
         DCHECK(frame->domWindow());
         m_serviceWorker = ServiceWorkerContainer::create(frame->domWindow()->getExecutionContext());
     }
     return m_serviceWorker.get();
 }
 
 void NavigatorServiceWorker::contextDestroyed()
 {
-    if (m_serviceWorker) {
-        m_serviceWorker->willBeDetachedFromFrame();
-        m_serviceWorker = nullptr;
-    }
+    m_serviceWorker = nullptr;
 }
 
 DEFINE_TRACE(NavigatorServiceWorker)
 {
     visitor->trace(m_serviceWorker);
     Supplement<Navigator>::trace(visitor);
     ContextLifecycleObserver::trace(visitor);
 }
 
 } // namespace blink