Add the navigator.serviceWorker.waiting property.

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 142 matching lines @@
     // FIXME: Elaborate the implementation when the "waiting" property
     // or replace() is implemented.
     return ScriptPromise();
 }
 
 void ServiceWorkerContainer::setCurrentServiceWorker(blink::WebServiceWorker* serviceWorker)
 {
     setController(serviceWorker);
 }
 
+// If the WebServiceWorker is up for adoption (does not have a
+// WebServiceWorkerProxy owner), rejects the adoption by deleting the
+// WebServiceWorker.
+static void deleteIfNoExistingOwner(blink::WebServiceWorker* serviceWorker)
+{
+    if (serviceWorker && !serviceWorker->proxy())
+        delete serviceWorker;
+}
+
+void ServiceWorkerContainer::setWaiting(blink::WebServiceWorker* serviceWorker)
+{
+    if (!executionContext()) {
+        deleteIfNoExistingOwner(serviceWorker);
+        return;
+    }
+    m_waiting = ServiceWorker::from(executionContext(), serviceWorker);
+}
+
 void ServiceWorkerContainer::setController(blink::WebServiceWorker* serviceWorker)
 {
     if (!executionContext()) {
-        delete serviceWorker;
+        deleteIfNoExistingOwner(serviceWorker);
         return;
     }
-    m_controller = ServiceWorker::create(executionContext(), adoptPtr(serviceWorker));
+    m_controller = ServiceWorker::from(executionContext(), serviceWorker);
 }
 
 void ServiceWorkerContainer::dispatchMessageEvent(const blink::WebString& message, const blink::WebMessagePortChannelArray& webChannels)
 {
     if (!executionContext() || !window())
         return;
 
     OwnPtr<MessagePortArray> ports = MessagePort::toMessagePortArray(executionContext(), webChannels);
     RefPtr<SerializedScriptValue> value = SerializedScriptValue::createFromWire(message);
     window()->dispatchEvent(MessageEvent::create(ports.release(), value));
@@ skipping 10 matching lines @@
         return;
 
     if (ServiceWorkerContainerClient* client = ServiceWorkerContainerClient::from(executionContext)) {
         m_provider = client->provider();
         if (m_provider)
             m_provider->setClient(this);
     }
 }
 
 } // namespace WebCore