ActiveScriptWrappable: GC wrappers in detached ExecutionContexts.

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

 /*
  * 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 25 matching lines @@
 #include "bindings/core/v8/SerializedScriptValue.h"
 #include "core/workers/AbstractWorker.h"
 #include "modules/ModulesExport.h"
 #include "public/platform/modules/serviceworker/WebServiceWorker.h"
 #include "public/platform/modules/serviceworker/WebServiceWorkerProxy.h"
 #include "wtf/PassRefPtr.h"
 #include <memory>
 
 namespace blink {
 
-class MODULES_EXPORT ServiceWorker final : public AbstractWorker,
-                                           public ActiveScriptWrappable,
-                                           public WebServiceWorkerProxy {
+class MODULES_EXPORT ServiceWorker final
+    : public AbstractWorker,
+      public ActiveScriptWrappable<ServiceWorker>,
+      public WebServiceWorkerProxy {
   DEFINE_WRAPPERTYPEINFO();
   USING_GARBAGE_COLLECTED_MIXIN(ServiceWorker);
 
  public:
   static ServiceWorker* from(ExecutionContext*,
                              std::unique_ptr<WebServiceWorker::Handle>);
 
   ~ServiceWorker() override;
   DECLARE_VIRTUAL_TRACE();
 
@@ skipping 32 matching lines @@
   void contextDestroyed() override;
 
   // A handle to the service worker representation in the embedder.
   std::unique_ptr<WebServiceWorker::Handle> m_handle;
   bool m_wasStopped;
 };
 
 }  // namespace blink
 
 #endif  // ServiceWorker_h