ActiveScriptWrappable: GC wrappers in detached ExecutionContexts.

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

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 135 matching lines @@
 
   ServiceWorker* newWorker =
       new ServiceWorker(executionContext, std::move(handle));
   newWorker->suspendIfNeeded();
   return newWorker;
 }
 
 ServiceWorker::ServiceWorker(ExecutionContext* executionContext,
                              std::unique_ptr<WebServiceWorker::Handle> handle)
     : AbstractWorker(executionContext),
-      ActiveScriptWrappable(this),
+      ActiveScriptWrappable<ServiceWorker>(this),
       m_handle(std::move(handle)),
       m_wasStopped(false) {
   ASSERT(m_handle);
   m_handle->serviceWorker()->setProxy(this);
 }
 
 ServiceWorker::~ServiceWorker() {}
 
 DEFINE_TRACE(ServiceWorker) {
   AbstractWorker::trace(visitor);
 }
 
 }  // namespace blink