module.exports should default to an empty object.

sky/engine/core/app/AbstractModule.cpp

 // 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.
 
 #include "sky/engine/config.h"
 #include "sky/engine/core/app/AbstractModule.h"
 
 #include "sky/engine/core/app/Module.h"
 
 namespace blink {
@@ skipping 23 matching lines @@
   OwnPtr<ModuleLoader> loader =
       adoptPtr(new ModuleLoader(this, GetApplication(), url));
   loaders_.set(loader.release(), resolver);
   return resolver->promise();
 }
 
 void AbstractModule::OnModuleLoadComplete(ModuleLoader* loader,
                                           Module* module) {
   RefPtr<ScriptPromiseResolver> resolver = loaders_.take(loader);
   ScriptState::Scope scope(resolver->scriptState());
-  resolver->resolve(module->exports().v8Value());
+  resolver->resolve(module->exports(resolver->scriptState()).v8Value());
 }
 
 } // namespace blink