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

Source/bindings/v8/custom/V8TypedArrayCustom.h

 /*
  * Copyright (C) 2013 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 73 matching lines @@
         }
         if (DOMDataStore::setReturnValueFromWrapper<Binding>(info.GetReturnValue(), impl))
             return;
         v8::Handle<v8::Object> wrapper = wrap(impl, info.Holder(), info.GetIsolate());
         info.GetReturnValue().Set(wrapper);
     }
 
     template<typename CallbackInfo>
     static void v8SetReturnValueForMainWorld(const CallbackInfo& info, TypedArray* impl)
     {
-        ASSERT(DOMWrapperWorld::current(info.GetIsolate())->isMainWorld());
+        ASSERT(DOMWrapperWorld::current(info.GetIsolate()).isMainWorld());
         if (UNLIKELY(!impl)) {
             v8SetReturnValueNull(info);
             return;
         }
         if (DOMDataStore::setReturnValueFromWrapperForMainWorld<Binding>(info.GetReturnValue(), impl))
             return;
         v8::Handle<v8::Value> wrapper = wrap(impl, info.Holder(), info.GetIsolate());
         info.GetReturnValue().Set(wrapper);
     }
 
@@ skipping 81 matching lines @@
 template <typename TypedArray>
 void V8TypedArray<TypedArray>::derefObject(void* object)
 {
     static_cast<TypedArray*>(object)->deref();
 }
 
 
 } // namespace WebCode
 
 #endif // V8TypedArrayCustom_h