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

Source/bindings/tests/results/V8TestInterfaceNamedConstructor.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file has been auto-generated by code_generator_v8.py. DO NOT MODIFY!
 
 #ifndef V8TestInterfaceNamedConstructor_h
 #define V8TestInterfaceNamedConstructor_h
 
 #include "bindings/tests/idls/TestInterfaceNamedConstructor.h"
@@ skipping 67 matching lines @@
     }
     if (DOMDataStore::setReturnValueFromWrapper<V8TestInterfaceNamedConstructor>(callbackInfo.GetReturnValue(), impl))
         return;
     v8::Handle<v8::Object> wrapper = wrap(impl, callbackInfo.Holder(), callbackInfo.GetIsolate());
     v8SetReturnValue(callbackInfo, wrapper);
 }
 
 template<typename CallbackInfo>
 inline void v8SetReturnValueForMainWorld(const CallbackInfo& callbackInfo, TestInterfaceNamedConstructor* impl)
 {
-    ASSERT(DOMWrapperWorld::current(callbackInfo.GetIsolate()).isMainWorld());
+    ASSERT(DOMWrapperWorld::current(callbackInfo.GetIsolate())->isMainWorld());
     if (UNLIKELY(!impl)) {
         v8SetReturnValueNull(callbackInfo);
         return;
     }
     if (DOMDataStore::setReturnValueFromWrapperForMainWorld<V8TestInterfaceNamedConstructor>(callbackInfo.GetReturnValue(), impl))
         return;
     v8::Handle<v8::Value> wrapper = wrap(impl, callbackInfo.Holder(), callbackInfo.GetIsolate());
     v8SetReturnValue(callbackInfo, wrapper);
 }
 
@@ skipping 28 matching lines @@
 }
 
 template<class CallbackInfo, class Wrappable>
 inline void v8SetReturnValueFast(const CallbackInfo& callbackInfo, PassRefPtr<TestInterfaceNamedConstructor> impl, Wrappable* wrappable)
 {
     v8SetReturnValueFast(callbackInfo, impl.get(), wrappable);
 }
 
 }
 #endif // V8TestInterfaceNamedConstructor_h