Revert 170357 "Revert of Make DOMWrapperWorld::current() return ..."

trunk/Source/core/loader/FrameLoader.cpp

Index: trunk/Source/core/loader/FrameLoader.cpp
===================================================================
--- trunk/Source/core/loader/FrameLoader.cpp	(revision 170423)
+++ trunk/Source/core/loader/FrameLoader.cpp	(working copy)
@@ -1399,10 +1399,10 @@
     Vector<RefPtr<DOMWrapperWorld> > worlds;
     DOMWrapperWorld::allWorldsInMainThread(worlds);
     for (size_t i = 0; i < worlds.size(); ++i)
-        m_client->dispatchDidClearWindowObjectInWorld(worlds[i].get());
+        m_client->dispatchDidClearWindowObjectInWorld(*worlds[i]);
 }
 
-void FrameLoader::dispatchDidClearWindowObjectInWorld(DOMWrapperWorld* world)
+void FrameLoader::dispatchDidClearWindowObjectInWorld(DOMWrapperWorld& world)
 {
     if (!m_frame->script().canExecuteScripts(NotAboutToExecuteScript) || !m_frame->script().existingWindowShell(world))
         return;