[WIP] Migrate hasPendingActivity from ActiveDOMObject to ScriptWrappable.

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 99 matching lines @@
 {
     if (!worker)
         return nullptr;
 
     RefPtrWillBeRawPtr<ServiceWorker> serviceWorker = getOrCreate(executionContext, worker);
     return serviceWorker.release();
 }
 
 bool ServiceWorker::hasPendingActivity() const
 {
-    if (AbstractWorker::hasPendingActivity())
+    if (ActiveDOMObject::hasPendingActivity())
         return true;
     if (m_wasStopped)
         return false;
     return m_outerWorker->state() != WebServiceWorkerStateRedundant;
 }
 
 void ServiceWorker::stop()
 {
     m_wasStopped = true;
 }
@@ skipping 42 matching lines @@
     // the embedder might risk accessing a to-be-finalized object that
     // is not in a valid state.
     //
     // The dispose() method is hooked up to the garbage collector by
     // way of a "pre finalizer", a method that is run after marking
     // has completed, but before any sweeping takes place.
     m_outerWorker.clear();
 }
 
 } // namespace blink