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

Source/bindings/v8/SerializedScriptValue.cpp

Index: Source/bindings/v8/SerializedScriptValue.cpp
diff --git a/Source/bindings/v8/SerializedScriptValue.cpp b/Source/bindings/v8/SerializedScriptValue.cpp
index aadb4c7bdb8ba33377a1547bd4bec72bae351588..18e6458e4640cd124fc0e428e7fae6d582366381 100644
--- a/Source/bindings/v8/SerializedScriptValue.cpp
+++ b/Source/bindings/v8/SerializedScriptValue.cpp
@@ -2772,7 +2772,7 @@ static void neuterArrayBufferInAllWorlds(ArrayBuffer* object)
             }
         }
     } else {
-        v8::Handle<v8::Object> wrapper = DOMDataStore::current(isolate).get<V8ArrayBuffer>(object, isolate);
+        v8::Handle<v8::Object> wrapper = DOMWrapperWorld::current(isolate)->domDataStore().get<V8ArrayBuffer>(object, isolate);
         if (!wrapper.IsEmpty()) {
             ASSERT(wrapper->IsArrayBuffer());
             v8::Handle<v8::ArrayBuffer>::Cast(wrapper)->Neuter();