Implement initial part of WebEmbeddedWorker

Source/core/workers/WorkerScriptLoader.h

Index: Source/core/workers/WorkerScriptLoader.h
diff --git a/Source/core/workers/WorkerScriptLoader.h b/Source/core/workers/WorkerScriptLoader.h
index 88875f14591109503c17b5afd5c1954c4cce3fd9..e4038516948a9684b3d118a275a7331a212f6631 100644
--- a/Source/core/workers/WorkerScriptLoader.h
+++ b/Source/core/workers/WorkerScriptLoader.h
@@ -58,6 +58,12 @@ namespace WebCore {
 
         void notifyError();
 
+        // This will immediately lead to notifyFinished() if loadAsynchronously
+        // is in progress.
+        void cancel();
+
+        void setClient(WorkerScriptLoaderClient* client) { m_client = client; }
+
         String script();
         const KURL& url() const { return m_url; }
         const KURL& responseURL() const;