Make DOMWrapperWorld::current() return a reference instead of a pointer

Source/bindings/v8/DOMWrapperWorld.cpp

 /*
  * 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 42 matching lines @@
     return adoptRef(new DOMWrapperWorld(worldId, extensionGroup));
 }
 
 DOMWrapperWorld::DOMWrapperWorld(int worldId, int extensionGroup)
     : m_worldId(worldId)
     , m_extensionGroup(extensionGroup)
     , m_domDataStore(adoptPtr(new DOMDataStore(isMainWorld())))
 {
 }
 
-DOMWrapperWorld* DOMWrapperWorld::mainWorld()
+DOMWrapperWorld& DOMWrapperWorld::mainWorld()
 {
     ASSERT(isMainThread());
     DEFINE_STATIC_REF(DOMWrapperWorld, cachedMainWorld, (DOMWrapperWorld::create(MainWorldId, mainWorldExtensionGroup)));
-    return cachedMainWorld;
+    return *cachedMainWorld;
 }
 
 typedef HashMap<int, DOMWrapperWorld*> WorldMap;
 static WorldMap& isolatedWorldMap()
 {
     ASSERT(isMainThread());
     DEFINE_STATIC_LOCAL(WorldMap, map, ());
     return map;
 }
 
 void DOMWrapperWorld::allWorldsInMainThread(Vector<RefPtr<DOMWrapperWorld> >& worlds)
 {
     ASSERT(isMainThread());
-    worlds.append(mainWorld());
+    worlds.append(&mainWorld());
     WorldMap& isolatedWorlds = isolatedWorldMap();
     for (WorldMap::iterator it = isolatedWorlds.begin(); it != isolatedWorlds.end(); ++it)
         worlds.append(it->value);
 }
 
 DOMWrapperWorld::~DOMWrapperWorld()
 {
     ASSERT(!isMainWorld());
 
     dispose();
@@ skipping 103 matching lines @@
         isolatedWorldContentSecurityPolicies().remove(worldId);
 }
 
 void DOMWrapperWorld::clearIsolatedWorldContentSecurityPolicy(int worldId)
 {
     ASSERT(isIsolatedWorldId(worldId));
     isolatedWorldContentSecurityPolicies().remove(worldId);
 }
 
 } // namespace WebCore