Make ServiceWorker an ActiveDOMObject

Source/modules/serviceworkers/ServiceWorker.h

Index: Source/modules/serviceworkers/ServiceWorker.h
diff --git a/Source/modules/serviceworkers/ServiceWorker.h b/Source/modules/serviceworkers/ServiceWorker.h
index 58a40ea43e8145cdfe3a95e98223ac0bee06f158..ecd0a1befeab95ac9155f0a5d162efea564d2178 100644
--- a/Source/modules/serviceworkers/ServiceWorker.h
+++ b/Source/modules/serviceworkers/ServiceWorker.h
@@ -77,13 +77,25 @@ public:
 private:
     class ThenFunction;
 
+    enum ProxyState {
+        Initial,
+        RegisterPromisePending,
+        Ready,
+        ContextStopped
+    };
+
     static PassRefPtr<ServiceWorker> create(ExecutionContext*, PassOwnPtr<blink::WebServiceWorker>);
     ServiceWorker(ExecutionContext*, PassOwnPtr<blink::WebServiceWorker>);
+    void setProxyState(ProxyState);
     void onPromiseResolved();
     void waitOnPromise(ScriptPromise);
 
+    // ActiveDOMObject overrides.
+    virtual bool hasPendingActivity() const OVERRIDE;
+    virtual void stop() OVERRIDE;
+
     OwnPtr<blink::WebServiceWorker> m_outerWorker;
-    bool m_isPromisePending;
+    ProxyState m_proxyState;
 };
 
 } // namespace WebCore