Have DOMDataStore::current() return a reference

Source/bindings/v8/DOMWrapperWorld.h

 /*
  * Copyright (C) 2009 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 85 matching lines @@
     // Associate a logger with the world identified by worldId (worlId may be 0
     // identifying the main world).
     static void setActivityLogger(int worldId, PassOwnPtr<V8DOMActivityLogger>);
     static V8DOMActivityLogger* activityLogger(int worldId);
 
     bool isMainWorld() const { return m_worldId == MainWorldId; }
     bool isIsolatedWorld() const { return isIsolatedWorldId(m_worldId); }
 
     int worldId() const { return m_worldId; }
     int extensionGroup() const { return m_extensionGroup; }
-    DOMDataStore* isolatedWorldDOMDataStore() const
+    DOMDataStore& isolatedWorldDOMDataStore() const
     {
         ASSERT(isIsolatedWorld());
-        return m_domDataStore.get();
+        return *m_domDataStore;
     }
     v8::Handle<v8::Context> context(ScriptController&);
 
     static void setInitializingWindow(bool);
 
 private:
     static int isolatedWorldCount;
     static PassRefPtr<DOMWrapperWorld> createMainWorld();
     static bool contextHasCorrectPrototype(v8::Handle<v8::Context>);
 
     DOMWrapperWorld(int worldId, int extensionGroup);
 
     const int m_worldId;
     const int m_extensionGroup;
     OwnPtr<DOMDataStore> m_domDataStore;
 
     friend DOMWrapperWorld* mainThreadNormalWorld();
     friend DOMWrapperWorld* existingWindowShellWorkaroundWorld();
 };
 
 DOMWrapperWorld* mainThreadNormalWorld();
 
 // FIXME: this is a workaround for a problem in ScriptController
 // Do not use this anywhere else!!
 DOMWrapperWorld* existingWindowShellWorkaroundWorld();
 
 } // namespace WebCore
 
 #endif // DOMWrapperWorld_h