ServiceWorker: Bypass resolving a promise when ExecutionContext is gone

Source/modules/serviceworkers/ServiceWorkerRegistration.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 "config.h"
 #include "ServiceWorkerRegistration.h"
 
 #include "bindings/core/v8/CallbackPromiseAdapter.h"
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
@@ skipping 13 matching lines @@
 #ifdef DISABLE_SERVICE_WORKER_REGISTRATION
     typedef WebServiceWorker WebType;
 #else
     typedef WebServiceWorkerRegistration WebType;
 #endif
     static V8UndefinedType from(ScriptPromiseResolver* resolver, WebType* registration)
     {
         ASSERT(!registration); // Anything passed here will be leaked.
         return V8UndefinedType();
     }
+    static void dispose(WebType* registration)
+    {
+        ASSERT(!registration); // Anything passed here will be leaked.
+    }
 
 private:
     UndefinedValue();
 };
 
 const AtomicString& ServiceWorkerRegistration::interfaceName() const
 {
     return EventTargetNames::ServiceWorkerRegistration;
 }
 
@@ skipping 46 matching lines @@
     ASSERT(m_outerRegistration);
     ScriptWrappable::init(this);
 
     if (!executionContext)
         return;
     if (ServiceWorkerContainerClient* client = ServiceWorkerContainerClient::from(executionContext))
         m_provider = client->provider();
 }
 
 } // namespace blink