ServiceWorker: Wait for registration promise to resolve before changing states.

Source/modules/serviceworkers/ServiceWorkerContainer.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 81 matching lines @@
         return promise;
     }
 
     m_provider->registerServiceWorker(patternURL, scriptURL, new CallbackPromiseAdapter<ServiceWorker, ServiceWorkerError>(resolver));
     return promise;
 }
 
 class UndefinedValue {
 public:
     typedef WebServiceWorker WebType;
-    static v8::Handle<v8::Value> from(NewScriptState* scriptState, WebServiceWorker* worker)
+    static V8UndefinedType from(ScriptPromiseResolverWithContext* resolver, WebServiceWorker* worker)
     {
         ASSERT(!worker); // Anything passed here will be leaked.
-        return v8::Undefined(scriptState->isolate());
+        return V8UndefinedType();
     }
 
 private:
     UndefinedValue();
 };
 
 ScriptPromise ServiceWorkerContainer::unregisterServiceWorker(ExecutionContext* executionContext, const String& pattern)
 {
     ASSERT(RuntimeEnabledFeatures::serviceWorkerEnabled());
     RefPtr<ScriptPromiseResolverWithContext> resolver = ScriptPromiseResolverWithContext::create(NewScriptState::current(toIsolate(executionContext)));
@@ skipping 32 matching lines @@
         return;
 
     if (ServiceWorkerContainerClient* client = ServiceWorkerContainerClient::from(executionContext)) {
         m_provider = client->provider();
         if (m_provider)
             m_provider->setClient(this);
     }
 }
 
 } // namespace WebCore